Letter, from John William Lubbock to Sir John Herschel Autograph letter signed by sender. Much obliged for John Frederick William Herschel calling but regrets he was out. The question [on steam] they have been discussing seems to be answered by a paper by a Prof. Karl Holtzmann he has just come across; comments on this. If John Frederick William Herschel is coming to S. J. A. Compton's (2nd Marquis of Northampton) soiree will he come and dine at St. James' Place? 13 February 1845