At the Geographical Society meeting on 3 May 1837, Darwin read his paper on strata around Río de la Plata where he had found fossils including the Toxodon. At the same meeting, announcements were made of the first discoveries of ancient fossil primates; finds by Proby Cautley and Hugh Falconer in Neogene strata of the Sivalik Hills, and by Édouard Lartet in Miocene beds at Sansan, Gers. Later, Lyell joked uncomfortably to his sister that according to Lamarck's view, there may have been a great many thousand centuries for their tails to wear off, and the transformation to men to take place, but Darwin was beginning to look at these wonderful fossils in relation to transmutation.