Additional Manuscripts a

JDF has had WW's letters reprinted with instructions to send them to Mrs Marshall's at 21 Upper Grosvernor Street, London. 'I see that you have perceived that Herschel has a notion of the glacier moving piece-meal like a load of stones shot from a cart: and that this is especially different from the viscous theory which admits of strains on the parts as well as thrusts. It is plain that Sir J. H. dashed at the subject without considering it'. A year ago JH said 'I had not formed quite a clear idea' of my own theory, he also gave the above example in the form of 'a crush coming out of the Theatre'.