In the historic letter below, Janet Travell, M.D. wrote to her friend and colleague, David G. Simons, M.D., in response to a letter that she had received from him, to tell him that he had "hit the nail on the head" with his outline about how the two of them could proceed in putting together a medical textbook about myofascial pain and trigger points [a trigger point manual] which, of course, they did.