Response to [3020]. CD has been misled by errors made in the Times notice [5 Dec 1860, p. 5]. GCW does not doubt that Foraminiferous matter as well as other deep sea deposits vary greatly in thickness, but positive results are difficult to establish. Some areas of the sea bed are bare but their extent has not been established. He now thinks that he was too hasty in the conclusion that deep currents produce abrasion and rounding of gravel.

In a forthcoming lecture GCW will dispute Haeckel on Protista and his statement that spontaneous generation is necessary to complete evolution as a doctrine. Wishes to confirm his understanding that CD has nowhere expressed himself on the "origin of life", and has considered only the manner of succession.