The Hollow Chest is a novel that was published in 1941 by Phoebe Atwood Taylor writing as Alice Tilton.
[1] It's Egg Day in Dalton (a New England town near Boston) and Leonidas Witherall, "the man who looks like Shakespeare", returns home from shepherding some students on an Egg Day outing to find his house ransacked, his safe open, and a beautiful blonde bound and gagged on his bed.
Then a wealthy neighbor asks him to run an unusual errand, promising his school an endowment if he does so—in full evening dress, he meets the blonde on a Dalton corner and relieves her of a hollow chest that looks much heavier than it is.
A murder occurs under embarrassing circumstances, and Leonidas forms a motley crew of assistants together in order to track down clues, chase around the town, and solve the mystery.
Some supporting characters continue between novels; there is always a beautiful girl, a handsome former student, and an intrepid housewife.