Freeman Wills Crofts wrote his detective stories during the first half of the twentieth century. His readership at the time would have clear recollections of childhood hours spent with toy trains, Meccano sets and Chemistry sets. Much of the enjoyment in constructing and experimenting provided by these childhood pastimes may be found by adult readers of his books, then and now.
This one is in the Chemistry set category. At the heart of the mystery is a process for desalinating sea water. This one is also an attempt by Crofts to try his hand at the "English Country House" murder mystery. All the stock characters are there - the unpopular host, the troubled wife and her secret lover, the nephew, the secretary, the laboratory worker, the butler, an aggrieved sacked employee, the chauffeur, the gardener, and a full staff of female domestics. Crofts' attempt is better written than most, and just as baffling as the best of them. His regular sleuth, Chief Detective Inspector French, is provided with an assistant named Rollo. This allows for a little raillery and sarcasm, as in this comment by French, "You'll find, Mr Inspector Rollo, that if you are to succeed at this game, you'll need all the wits you've got - probably more". Readers too will need all the wits they've got to solve the mystery in this fine 1942 novel, newly reprinted by the House of Stratus.