"In response to Mr. Hosking's plea (Bulletin No. 12) for details of the early B. Guiana code marks, I can give the following dated copies: - A3C (20/12/64), A5C (27/9/185-) and (16/7/77), W1C (16/6/75), W3C (5/4/62), W4C (6/5/74), WCB/3 (?/6/186-), E1C (11/1/76), E2C (9/3/74), E4C (23/7/62) and (22/3/70), E5C (3/5/?1873), E6C (9/12/65) and (11/3/74), E7C (22/8/?74), W (5/2/70), Wl (1/7/?72), W2 (16/7/68), L (14/7/77), R (18/3/71), A.H. (31/7/77), E.R. (26/10/80.)
I have undated copies of A1C, A2C, DRW.1, E3C, CCB and an 1863 'proving cover' of Mahaicony (E7C), which unluckily is one that Mr. Hosking already knows. Like Mr. Hoskings, I am very interested in these code marks and should like to hear details of any other 'proving covers' in the possession of members. Counting up the relatively well-known marks and comparing them with Mr. Hosking's total of 44, I can only assume that he has found ACB1 and 2 to exist. I knew only of a 'possibility.' If so, what does ACB stand for? Many members probably know of Mr. P. Jaffe's 'tentative solution' to the problem of these code marks. With due respect to a most interesting writer, I can but think that the 'solution' is little more than intelligent guess-work."