London: Collins Crime Club , (1975.) dj. Hardcover first edition - Mystery featuring Dave Cannon, an American rare book and antiques dealer, who after a fruitless buying trip in Wales finds himself stranded in a border town where he is offered a bowl the owner claimed was the Holy Grail. The seller is found dead - hanged - the next day and Cannon finds himself in danger. 192 pp. Dust jacket art by B. H. Payne. ISBN: 0-002311763.