Ware your market, on this, for it is a bit in the modern vein, although it purports to be a story of mediaeval days. ""A fable for sceptics"" say the publishers. We agree. Privately printed in England, this amusing tale of the crusader who insured his wife's chastity in his absence, with unexpected results, won its way into popular favor with a sophisticated market. Verges on the pornographic. Issued now as a slight gift book, beautifully designed and printed.