This “whodunit” did an excellent job of mixing the bread crumbs with the stones (explanation at the bottom). Which I did not solve until Ellery was explaining it (I did get it before he made it clear though). Written in 1934 the language and the people stereotypes maybe a bit dated for some readers (some of the clues were dated too). Which is my excuse for not solving it. Still a great read for mystery lovers.
Bread crumbs and stones taken from Hansel and Gretal (trail leading back to the killer)
Bread crumbs (clues) easy to see (but eaten by birds) and lead nowhere.
Stones (clues) hard to see but will lead to the killer.