i see that on the th november you edited the entry for the sennar dam stating the information below it was built in 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 's although i cannot contest the second statement i cannot 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 p page 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 the consulting engineers were the late sir a l webb m inst c e from until his death in and messrs coode fitzmaurice wilson and mitchell from to the present date colonel l n cooper m inst c e was appointed resident engineer in followed by mr e w buckley from to the author has held that office from to the present date the contractors from to were the sudan construction company messrs e alessandrini and g s perry m inst c e from 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