Notes for 4 lectures on the 'Volcanic History of Britain', given to the Royal Institution in 1886. Sir Archibald Geikie looked at the emergence of types of geological formations against a geological timeframe and how they have been affected by various processes, especially the action of volcanoes and materials produced by them, within the natural world. He used examples from numerous locations from different parts of the British Isles.

Gregory provides information on what he believes to be the causes of evolution of mammals from reptiles.

The latter part of the letter, incuding the author's signature, is not present.

Letter to Sir Archibald Geikie from Robert Broom telling Geikie that he has named a fossil after a colleague John Young. The fossil, Youngina, is possibly the common ancestor of lizards, crocodiles, dinosaurs, pterodactyls and birds. He describes his work progress in South Africa including a drawing of a gorgonopsid reptile skeleton.

Note collected from Donald Currie, crofter, Baile Meadhanach/Ballymeanach, Ìle/Islay, which reads 'An cleireach mac crubag Dearc luachrach lotai[dh] [th]u sin 3 siuil mhara. His sister was stung & it last[ed] thus' indicating that his sister was stung by a lizard and the sting lasted three tides or eighteen hours. Text has been scored through as if transcribed elsewhere.