I see that on the 28th November 2009 you edited the entry for the Sennar Dam stating the information below It was built in 1925 by the British engineer desert explorer and adventurer Stephen Roy Sherlock under the direction of Weetman Pearson You further go on to say that Once completed the dam was managed by Roy Sherlock until the 1970 s Although I can not contest the second statement I can not agree with the contention in the first sentence It may be that Stephen Roy Sherlock worked on the construction of the Sennar Makwar Dam However Pearson s Contract Agent was my grandfather John Watson Gibson The entry for the Sennar Dam gives a reference to O L Prowde The Gezira Irrigation Scheme Including the Sennar Dam on the Blue Nile Minutes of Proceedings of the Institution of Civil Engineers Vol 222 p 80 1926 Page 96 of that document contains the following The scheme was designed by Sir Murdoch MacDonald M Inst C E Adviser to the Egyptian Ministry of Public Works He also exercised control over the carrying out of the work until his retirement from the Egyptian Government Service in 1921 The consulting engineers were the late Sir A L Webb M Inst C E from 1914 until his death in 1921 and Messrs Coode Fitzmaurice Wilson and Mitchell from 1922 to the present date Colonel L N Cooper M Inst C E was appointed resident engineer in 1914 followed by Mr E W Buckley from 1914 to 1917 The Author has held that office from 1917 to the present date The contractors from 1919 to 1922 were the Sudan Construction Company Messrs E Alessandrini and G S Perry M Inst C E From 1922 to the completion Messrs S Pearson and Son Ltd carried out the work Their director in charge was Sir Frederick T Hopkinson M Inst CE the agent in charge being Mr J W Gibson The sub contractors for the supply and erection of the sluice steelwork were Messrs Ransomes and Rapier Ltd of Ipswich their engineer in charge being Mr J R Russell On this basis I propose to amend the entry accordingly I would be very interested to know more about Stephen Roy Sherlock if you have it