Autograph letter signed to unnamed correspondent

Historian and essayist (1834-1895). One page, 8vo. He discussses Baron Tauchnitz's involvement in one of his books [probably the "Life and Times of Stein; or, Germany & Prussia in the Napoleonic Age" (Todd 1849, Cambridge, 1878)]. "As to the honorarium, I am advised that Baron Tauchnitz ought to make an offer".