A correspondent writes:
I’ve returned to one of my favorite recipes from one of my favorite cookbooks, Chocolate Cracks, from Maida Heatter’s Book of Great Desserts, paperback, 1974 printing. The book is so old that not only has it broken into two parts, but portions of several pages have flaked away, taking with them the part of this recipe that tells me how long the cookies are to be baked. What to do? Google and Google Books to the rescue: 12 to 13 minutes!