"1930 (debut): "Miss Marple is a white-haired old lady with a gentle, appealing manner - Miss Wetherby is a mixture of vinegar and gush. Of the two Miss Marple is the more dangerous." (Vicar Clement.)"
"... and will take place on Friday, October 29, at 6:30 P.M." (1950) But the person ending up dead is the ad's author himself. So who is he and what's he got to do with Ms. Blacklog of Little Paddocks?"
"1950: 4 Miss Marple stories (plus 3 x Poirot, & the title story is the source of "The Mousetrap"): "Strange Jest," "Tape-Measure Murder," "The Case of the Perfect Maid" & "The Case of the Caretaker.""
"1976: "Let sleeping dogs lie" ... and sleeping murder, too! But Miss Marple's young friends Gwenda and Giles Reed disregard her advice, and soon discover things they wish they'd never found out about."