The Fingerprint — Patricia Wentworth

It was an unenchanted evening for Georgina Grey. First came her discovery of her once beloved, now quite dead Uncle Jonathan. Then when she picked up the murder revolver, out of shocked but ill-placed curiosity, her doom was all but sealed. The fact that she stood to inherit a fortune from Jonathan's demise only tightened the noose.

Yet there remained a puzzle, one whose solution might prove Georgina's timely salvation--a missing page from her uncle's prized fingerprint collection, a clue to an older, long-buried crime that might still be claiming victims. Could it now be pointing the way to the true killer of Jonathan Field? It was a question only the deceptively cozy and brilliantly unerring Miss Silver could answer...