Thursday July 22, 2021 David Poole
The Case of the Missing Themers Today's outing is by frequent contributor David Poole, a mathematician who last appeared on the Corner on July 1 of this year. Here he was interviewed by C.C. just last September . I have to admit that I was initially very perplexed by this puzzle's theme: there is a reveal clue, but no actual theme clues for it to reveal (probably old hat for veteran solvers, but not for this relative newbie). Here it is: 37A. Place to find a date ... and any one of four in this puzzle (circled letters are hints): CORNER STONE . Obviously you often "find a date" on CORNERSTONES and they're usually expressed in Roman numerals . So Bill was off and running, looking for Roman numerals in the corners, and of course found what he was looking for, as letters like M , L , I , and V are very common in Crosswords. But pretty soon I was down in the weeds, then beg...