1 The advertisement that Clemens enclosed has not been identified, but it was no doubt similar to the one in Publishers’ Weekly for 14 August (“Valuable Books,” 8:348): The agreement that Gill had reached with Osgood’s lawyers permitted him to offer for sale the two thousand copies of Burlesque containing Clemens’s sketch, but it evidently prohibited him from advertising his name (23 July 75 to Osgood, n. 3). “Arthur Sketchley” was the pseudonym of George Rose (1817–82), an English dramatist and humorist whose numerous sketches expressed the views of an illiterate old woman called “Mrs. Brown.” Burnand was an English humorist and contributor to Punch whom Clemens had met in 1873 (L5, 532–33).