"On pages 8 and 9 in Bulletin No. 16, Mr. Hosking asks about the St. Kitts abbreviated postmarks applied generally with the duplex obliterator, and the following notes may be of interest. I have examples of 'CA' with vertical 'A12' (killer) dated May 7. 24, 19mm which is 'CAYON', 'DB' also with vertical 'A12', same date and 19mm. being 'DIEPPE BAY' and 'SP' without killer dated May 14. 24, 25mm which refers to 'SANDY POINT'. I also have St. Kitts circled 'CAYON' dated 29 Dec. 28, 27mm. and 'DIEPPE BAY' dated 1928 day and month undecipherable, and St. Ki.tts 'A' (large A) April 22. 24, 25mm. which may be 'BASSETERRE.' 'ANGUILLA VALLEY had its own postmark in 1927, and I have some half dozen instances of this St. Kitts 'A' postmark on the 1912-22 issue of Leeward Islands dated March and April 1924, 25mm. (not duplex). The letter 'A' generally appears with the duplex Nevis 'A09' postmark. In the Leeward Islands 1890 issue I have one duplex cancellation St. Kitts 'SP' but cannot decipher the date. Mr. Hosking's 'CA' postmark on Leeward Islands S.G.I must, I consider, refer to 'CAYON' and presumably has been applied by the duplex St. Kitts 'A12 '.