The bestselling cookery book of the early seventeenth century was Gervase Markham's "The English Huswife", published in 1615. It appears that his recipes were from the collection of a deceased noblewoman, and therefore dated back to Elizabethan times or earlier. Women were thus becoming both the authors of cookery books and their readers, though only about 10% of women in England were literate by 1640. Markham's recipes are distinctively different from mediaeval ones; three quarters of his sauces for meat and meat pies make use of a combination of sweet and sour, and he advises: