EXECUTION VERSION
 
 EXCHANGE AGENT AGREEMENT
 by and among
Cogdell Spencer LP
 and
 the persons collectively referred to herein as the Seller Representative
 and
 Mellon Investor Services LLC
 in respect of the delivery of merger consideration to the stockholders of MEA Holdings, Inc.




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Parent Pelisek Ransom Lubar Seller Representative Agent
 Appointment
  Target Common
Shares Initial Merger
Consideration Preferred Shares Shares Exhibit
A Preferred Per Share Amount Merger Agreement Merger Share
Disbursement Instruction
 Option Payment Option Disbursement Instruction Disbursement Instructions
 Escrow
Agreement




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Letter of Transmittal
 TIN Record Stockholders List
     Procedure for Discrepancies
  2




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Certain Shares to be Cancelled
  Deposit of Funds
 Merger Fund
  Lost Certificates
  3




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Eligibility of Shares for Payment Exhibit B
 Procedure for Deficient Items
    Cancellation of Shares
  Report of Activity
  Tax Reporting
  4




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Unexchanged Stockholders
  Escheat
  5




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Authorizations and Protections
            6




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Indemnification
   Limitation of Liability
   7




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Representations, Warranties and Covenants
   Notices
  If to the Parent:
    
    with an additional copy to:Cogdell Spencer LP
    
    Clifford Chance US LLP4401 Barclay Downs Drive
    
    31 West 52nd StreetSuite 380
    
    New York, New York 10019Charlotte, NC 28209
    
    Attn: John A. HealyAttn: Frank Spencer
    
    Fax: (212) 878-8375Fax: (704) 940-2957If to Seller RepresentativeBaird Capital Partners
    
    Godfrey & Kahn, S.C.777 East Wisconsin Avenue
    
    780 North Water StreetP.O. Box 0672
    
    Milwaukee, WI 53202Milwaukee, WI 53201
    
    Attn: John A. Dickens, Esq.Attn: Dave Pelisek
    
    Fax No.: (414) 273-5198Fax No.: (414) 298-7490
    
    Telephone: (414) 273-3500Lubar & Co.
    
    Godfrey & Kahn, S.C.700 North Water Street
    
    780 North Water StreetSuite 1200
    
    Milwaukee, WI 53202
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Milwaukee, WI 53202
    
    Attn: John A. Dickens, Esq.Attn: David Lubar
    
    Fax No.: (414) 273-5198Fax No.: (414) 291-9061
    
    Telephone: (414) 273-3500Marshall Erdman & Associates, Inc.
    
    Godfrey & Kahn, S.C.P.O. Box 44975
    
    780 North Water StreetMadison, WI 53744
    
    Milwaukee, WI 53202Attn: Scott Ransom
    
    Attn: John A. Dickens, Esq.Fax No.: (608) 218-6575
    
    Fax No.: (414) 273-5198Telephone: (414) 273-3500If to Agent:
    
    with an additional copy to:Mellon Investor Services LLC
    
    Mellon Investor Services LLC480 Washington Blvd, 27th Floor
    
    480 Washington Blvd, 29th FloorJersey City NJ 07310
    
    Jersey City NJ 07310Attn: Event Manager
    
    Attn: Legal DepartmentTel: 201-680-3285
    
    Tel: 201-680-2198Fax: 201-680-4665
    
    Fax: 201-680-4610
 Specimen Signatures
 Exhibit C
 Confidentiality .
  NPPI
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Compensation and Expenses
 Exhibit D
   Termination
 provided however
 Force Majeure
  10




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Submission to Jurisdiction; Foreign Law .
   Miscellaneous
          11




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Customer Identification Program
  12




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COGDELL SPENCER LPBy:
    
    CS Business Trust I, its General PartnerBy:
    
    Cogdell Spencer Inc., its Sole Beneficial OwnerBy:Name:
    
    Frank C. SpencerTitle:
    
    President and CEOMELLON INVESTOR SERVICES LLCBy:Name:Title:
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The individuals listed below, asSELLER REPRESENTATIVEDavid P. PelisekDavid J. LubarScott A. Ransom
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Exhibit A
    
    Preferred Share accrued dividendsExhibit B
    
    Ineligible SharesExhibit C
    
    List of Authorized RepresentativesExhibit D
    
    Schedule of Fees
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16




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Stockholder
    
    Certificate Number (if any) of Shares
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Name
    
    Title
    
    Specimen SignatureFrank C. Spencer
    
    President and CEO of CogdellSpencer Inc., Sole BeneficialOwner of CS Business Trust I,the General Partner of CogdellSpencer LPCharles M. Handy
    
    Secretary and Chief FinancialOfficer of Cogdell SpencerInc., Sole Beneficial Owner ofCS Business Trust I, theGeneral Partner of CogdellSpencer LP
 
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Acceptance and Administrative Fee,
    
    $
    7,500.00File Conversion Fee, per file
    
    $
    2,500.00Annual Facility Fee
    
    $
    2,500.00Processing of Accounts, each billed in advance
Including Opening of Mail Items, Examining & Canceling
Certificates, Data Entry/System Updates, Quality Control,
DTC Payment
    
    $
    15.00Special Handling Items, additional
Including Items not providing a Taxpayer ID#,
Defective Items, Lost Items, Foreign Holders, etc
    
    $
    25.00Issue, Deliver and Reconcile Merger Payment Checks, each
    
    IncludedIssue, Deliver and Reconcile Escrow Distribution Checks, each
    
    IncludedPayments via Fed Wire transfer, each
    
    $
    250.00Prepare and File Form 1099B
With Tendering Shareholder and Appropriate Gov. Agencies
    
    IncludedOffice of Foreign Asset Control (OFAC) Reporting, each holder
    
    IncludedSpecial Services,
    
    By AppraisalOut of Pocket Expenses
Including Postage, Printing, Stationery,
Overtime, Transportation, Microfilming,
Legal Review of Contract, Imprinting, Mailing, etc.
    
    Additional
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