The Greyfriars Holiday Annual
The Holiday Annual was first published by Amalgamated Press in 1920 and was priced at a mighty six shillings, the equivalent of a years subscription to any one of the companion papers. It was a success and continued for 22 years, actually outliving the Magnet and Gem by a few months before becoming another victim of the paper shortage.
Howard Baker reprinted seven of the original annuals (1920, 1925, 1927, 1928, 1935, 1940 and 1941).
You can find a complete contents listing of the GHA in the publications section of The Greyfriars Index
The Holiday Annual by Roger Jenkins from SPC vol 3. Part 1 offers a brief description of each annual in turn. Part two describes the contents and origin of the Hamilton stories within.
A more detailed article again by Roger Jenkins for the 1971 Collectors Digest annual can be found here.
A scan of the original Holiday Annual for 1941 can be found here. (caution, 36mb)
An MS Word version of Billy Bunter's Burglar from the GHA of 1941 can be found here
A St Jim's story 'Glyn's Greatest' from the 1922 GHA can be found here