A rather unusual investigation for Professor Westborough this time. He is the owner of a block of shares in a Colorado gold mine and he is asked by another major shareholder to help oppose a take-over bid by a rival mine owner. Whilst a group of interested individuals tour the deep mine,one of them is shot in full view of the rest of them,but no-one seems to have fired the shot and no weapon is discovered. Historian and amateur detective,Theocritus Lucius Westborough,of course,solves the case and brings the culprit to justice.
This is a Golden Age thriller in the very best tradition. ( )