Scope and Contents Letter to Sir Archibald Geikie from Thomas George Bonney discussing the origin of basins in a glaciated landscape. He refutes the chemical erosion theory and supports the glacier erosion theory. He reports that he has studied the theory of glacial erosion on Alpine scenery in Wales, Scotland, Norway and Switzerland. He asks Geikie if he knows of a rock collector who could get him authenticated specimens of, amongst other locations, Eigg pitchstone. He reports on a field trip to...

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Letter to Sir Archibald Geikie from Thomas George Bonney apologising that he does not have a book which Geikie is seeking. He goes on to ask permission to use 2 figures from Ancient Volcanoes of Great Britain , ( 1897) in a publication.

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Letter to Sir Archibald Geikie from Thomas George Bonney expressing his commisserations at the death of one of Geikie's daughters.

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Summarised by Lyell as:
1) Bonney. Bunsen on Great Geyser 1872
2) Bonney, May 24 1873, Thanks for Antiquity, Ice-erosion glacier lakes etc
3) Bonney, ... students ..., Dec 30 1873
4) Bonney, Jan 30 1874, on Judd on volcanic rocks, Botzen earth pillars
5) Bonney, June 11. 1874, Thanks for Student's Elements.