Claim: Plum Stones stories were previously published in magazines, the volumes were published Galahad Books and authored by P. G. Wodehouse who was born in 1881.
Evidence: Sir Pelham Grenville Wodehouse KBE (/ˈwʊdhaʊs/ WOOD-howss; 15 October 1881 – 14 February 1975) was an English author and one of the most widely read humorists of the 20th century. All 25 stories were previously published in magazines, but not published in book form in the UK. The volumes were published posthumously between 1993 and 1995 in the UK by Galahad Books. P. G. Wodehouse