Crossed The Atlantic Twice -- On his 29-foot Yawl Temptress is 35-year-old Edward Allcard, naval architect of Cobham, Surrey, here he is just after arriving at Plymouth, Devonshire, after completing the double crossing of the Atlantic in the Yawl. The only food he had left was five potatoes. Some hard biscuits, and some tins of corned beef. The voyage from Casablanca should have been completed in under 30 days, but strong headwinds kept the Yawl back, and the voyage took 42 days.Allcard had no s