According to the Wiki Encyclopedia Captain Francis Drake's wife was Mary Newman not Mary Walker.
Francis Drake married Mary Newman in 1569. She died 12 years later, in 1581. In 1585, Drake married Elizabeth Sydenham—born circa 1562, the only child of Sir George Sydenham, of Combe Sydenham,[12] who was the High Sheriff of Somerset.[13] After Drake's death, the widow Elizabeth eventually married Sir William Courtenay of Powderham.[14] As Sir Francis Drake had no children, his estate and titles passed on to his nephew (also named Francis).
