The Boys' Realm Football and Sports library was published by the Amalgamated Press and ran from the 18th September 1909 to the  5th June 1915 before being replaced by the Nelson Lee.

The first 57 issues contained two stories. The main story was a Hamilton creation and featured Jack Noble of Pelham school. The secondary story featured the Blue crusaders and was by A. S. Hardy. In issue 57 the two series were amalgamated with Jack Noble joining the Blue Crusaders before making a final appearance in issue 84. Jack Noble of featured in both the Boys Realm and Boys Realm Football Library at the same time.

According to an article by Bill Lofts in Collectors Digest 233 Hamilton wrote only a few of the Jack Noble stories (Issue 1, 12 and possibly a few others) before the subs took over. In the same article Bill refers to Hamilton starting a new serial under his own name in the with the title "Captain of Clyffe". From the tone of the article I don't think Bill realised that this story wasn't original but in fact a reprint from the Boys Realm The Captain of Clyffe.
Bill also mentions a later Hamilton serial "The Rollicking schooldays of Sidney Redfern". I haven't read any of these stories but it is likely that  they were also reprinted from the Boys Realm.

The information provided in the table below was provided courtesy of Allan S.

If you can provide any more information on this rare publication then please contact me.

Issues that have been scanned in full are indicated by PDF icon-  
Issues that feature the Hamilton story only are hyperlinked