Document:

EXHIBIT 10.6

                          WAVERIDER COMMUNCIATIONS INC.
                          255 Consumers Road, Suite 500
                            Toronto, Ontario M2J 1R4

November 12, 2004

VIA FACSIMILE

CRESCENT INTERNATIONAL LTD.
c/o GreenLight (Switzerland) SA
84, Avenue Louis-Casai
CH 1216 Cointrin, Geneva
Switzerland
Attention: Mel Craw / Maxi Brezzi

                  Re:    Limited Waiver of Anti-Dilution Provisions
                         ------------------------------------------------------

Dear Investor:

         Reference is made to (a) that certain Convertible Debenture due July
14, 2006 (the "July Debenture") issued to Crescent International Ltd. (the
"Purchaser") pursuant to the Securities Purchase Agreement, dated July 14, 2003,
among WaveRider Communications Inc. (the "Company"), the Purchaser and the other
purchaser signatory thereto (the "July Purchase Agreement"), (b) that certain
Series R Stock Purchase Warrant (the "Series R Warrant") issued pursuant to the
July Purchase Agreement, (c) that certain Convertible Debenture due April 23,
2007 (the "April Debenture", collectively, the July Debenture and April
Debenture shall herein be referred to as the "Debentures") issued to the
Purchaser pursuant to the Securities Purchase Agreement, dated April 23, 2004,
among the Company, the Purchaser and the other purchaser signatory thereto (the
"April Purchase Agreement", collectively, the July Purchase Agreement and the
April Purchase Agreement shall herein be referred to as the "Purchase
Agreements"), and (d) that certain Series S Stock Purchase Warrant (the "Series
S Warrant", collectively, the Series R Warrant and the Series S Warrant shall
herein be referred to as the "Warrants") issued pursuant to the April Purchase
Agreement. Section 4(c)(iv) of the Debentures and Section 11(b)(i) of the
Warrants each provide that in the event the Company is deemed to have
consummated a Dilutive Issuance (as defined in the Debentures and the Warrants),
the set price of the Debentures and the exercise price of the Warrants shall
each be adjusted to equal the effective per share purchase price of the common
stock issued in the Dilutive Issuance. Concurrently with the execution of this
letter, the Company and the Purchaser are consummating another sale of the
Company's securities that would be deemed a Dilutive Issuance under the
Debentures and the Warrants and therefore would result in an adjustment under
Section 4(c)(iv) of the Debentures and Section 11(b)(i) of the Warrants (the
"Concurrent Offering").

         As additional consideration to the Company for agreeing to effect the
Concurrent Offering to the Purchaser, the Purchaser and the Company agree that
the adjustment as a result of the Concurrent Offering to (i) the set price of
the Debentures shall occur only to the extent such set price equals the set
price of the debenture issued in the Concurrent Offering and (ii) to the
exercise price of the Warrants shall occur only to the extent such exercise
price equals the exercise price of the warrants issued in the Concurrent
Offering. Any subsequent reductions or adjustments to the per share purchase
price of any securities issued in the Concurrent Offering shall not be subject
to Section 4(c)(iv) of the Debentures or Section 11(b)(i) of the Warrants.

         The Purchaser hereby consents to the issuance of the debenture and
warrants in the Concurrent Offering and expressly waives any default or
potential default that such issuance, without consent, may have or could have
caused under the Purchase Agreements, or the transaction documents contemplated
therein, including, without limitation, under Section 9 of the April Debenture.

         The waiver and agreement granted hereunder is as to the securities
issued solely pursuant to the Concurrent Offering. Any other issuances or
offerings by the Company not made in connection with the Concurrent Offering
shall remain subject to full adjustment under Section 4(c)(iv) of the Debentures
and Section 11(b)(i) of the Warrants. Except as specifically waived by the terms
of this letter, the Purchase Agreements and their exhibits shall remain
unmodified and in full force and effect, and shall not be in any way changed,
modified or superseded by the terms set forth herein. Capitalized terms used and
not otherwise defined herein that are defined in the Purchase Agreements shall
have the meanings given such terms in the Purchase Agreements.

<PAGE>

         This letter may be executed in any number of counterparts, all of which
taken together shall constitute one and the same instrument and shall become
effective when counterparts have been signed by each party and delivered to the
other parties hereto, it being understood that all parties need not sign the
same counterpart. Execution of this letter may be made by delivery by facsimile.

         Please indicate your agreement with the foregoing by executing a copy
of this letter and returning it to the undersigned.

Very truly yours,
WaveRider Communications Inc.

By: ____________________________________
Name:
Title:

Accepted and Agreed to:

CRESCENT INTERNATIONAL LTD.

By: _____________________________
Name:
Title:Exhibit 10.1
Amendment No. 2 to Asset Purchase and Sale Agreement

                                 AMENDMENT NO. 2
                                       TO
                        ASSET PURCHASE AND SALE AGREEMENT

     This Amendment No. 2 to the Asset Purchase and Sale Agreement dated October
26,  2004,  between  ONEOK  Propane  Distribution  Company,  a division of ONEOK
Propane  Company,  a  Delaware  corporation,  as  Seller,  and  Sonterra  Energy
Corporation,  a Texas corporation,  as Buyer (the "Agreement"),  is entered into
between Seller and Buyer as of November 1, 2004. Capitalized terms not otherwise
defined herein have the meanings given in the Agreement.

                                     Recital
                                     -------

     The Parties  desire to amend the  Agreement to modify the amount in Section
6.4(ii) associated with the system serving The Preserve at Barton Creek.

                                    Agreement
                                    ---------

     The final  sentence of Section  6.4(ii) of the  Agreement,  The Preserve at
Barton Creek and Lake Pointe, is amended to read in its entirety as follows:

     In the event (A) no settlement is reached in either or both of the Preserve
     Matter and the Lake Pointe Matter and (B) final  adjudication  results in a
     repudiation of the developer  agreement at issue in the  respective  matter
     and forfeiture of the distribution system, Seller shall refund to Buyer the
     amount of the Base Purchase Price allocated to the respective  distribution
     system,  which for the  Preserve  Matter  shall be one  hundred  twenty-one
     thousand  dollars  ($121,000.00),  and for the Lake Pointe  Matter shall be
     four hundred ninety-five  thousand dollars  ($495,000.00),  with the refund
     payment  constituting full and complete  satisfaction on the part of Seller
     for any damages to Buyer  resulting  from the  repudiation of the developer
     agreement and forfeiture of the distribution system.

     IN  WITNESS  WHEREOF,  the  Parties  have set  their  hands  by their  duly
     authorized officials.
                                            BUYER:

                                            Sonterra Energy Corporation, a Texas
                                            corporation

                                            By:     ____________________________
                                                    Michael R. Ward, President

                                            SELLER:

                                            ONEOK Propane Distribution Company,
                                            a division of ONEOK Propane Company,
                                            a Delaware corporation

                                            By:      ___________________________
                                                     D. Lamar Miller,
                                                     Senior Vice President -
                                                     Financial ServicesExhibit 10.2
Amendment No. 1 to Asset Purchase and Sale Agreement

                                 AMENDMENT NO. 1
                                       TO
                        ASSET PURCHASE AND SALE AGREEMENT

     This Amendment No. 1 to the Asset Purchase and Sale Agreement dated October
26,  2004,  between  ONEOK  Propane  Distribution  Company,  a division of ONEOK
Propane  Company,  a  Delaware  corporation,  as  Seller,  and  Sonterra  Energy
Corporation,  a Texas corporation,  as Buyer (the "Agreement"),  is entered into
between Seller and Buyer as of October 29, 2004. Capitalized terms not otherwise
defined herein have the meanings given in the Agreement.

                                    Recitals
                                    --------

     Section 7.2 of the Agreement  provides that the Closing of the transactions
contemplated by the Agreement will occur on or before October 29, 2004.  Section
7.3 of the Agreement defines the Effective Date. The Parties desire to close the
transactions on November 1, 2004, and set the Effective Date as October 1, 2004.

                                   Agreements
                                   ----------

     1. The first  sentence of Section 7.2 of the  Agreement,  Time and Place of
Closing, is amended to read in its entirety as follows:

     Closing  shall  occur on or before  November  1,  2004,  at 2:00  p.m.  CST
     (provided that all conditions to Closing contained within Section 7.1 above
     have been  met),  unless a later date is  mutually  agreed to in writing by
     both Parties.

     2. The first sentence of Section 7.3 of the Agreement,  Effective  Date, is
amended to read in its entirety as follows:

     The "Effective  Date" of the transfer from Seller to Buyer  hereunder shall
     be October 1, 2004.

     IN  WITNESS  WHEREOF,  the  Parties  have set  their  hands  by their  duly
     authorized officials.
                                            BUYER:

                                            Sonterra Energy Corporation, a Texas
                                            corporation

                                            By:     ____________________________
                                                    Michael R. Ward, President

                                            SELLER:

                                            ONEOK Propane Distribution Company,
                                            a division of ONEOK Propane Company,
                                            a Delaware corporation

                                            By:      ___________________________
                                                     D. Lamar Miller,
                                                     Senior Vice President -
                                                     Financial Services

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