Letter from [Percy Alexander] MacMahon, Deputy Warden of the Standards, Board of Trade, (Standards Department), Old Palace Yard, to the Secretary of the Royal Society, Burlington House 'Dear Sir, I shall be glad if you will be so good as to informs me whether you have portraits in your possession on which I could inspect, of the late Captain Henry Kater, Francis Baily, Esq, U.P.R.S., and R.A.S., and the Rev.R. Sheepshanks, F.R.S., F.R.A.S. Yours faithfully, P A MacMahon'. 4 January 1907