GSL/L/R/5/48 | Letter from Pierre Armand DUFRENOY | 24 Apr 1839 | |
GSL/L/R/6/421 | Letter from PA DUFRENOY & ELIE DE BEAUMONT | 4 Dec 1841 | |
GSL/L/R/6/487 | Letter from PA DUFRENOY & ELIE DE BEAUMONT | 10 Dec 1841 | |
GSL/L/R/10/278 | Letter from the ÉCOLE NATIONALE DES MINES | 10 Jul 1848 | |
GSL/OB/47 | Model of Mount Vesuvius | [after 1838] | |
LDGSL/838/L/17/15 | Murchison correspondence: letter from Charles LYELL | 20 Jun 1833 | |
LDGSL/849 | Paper 'Strictures on De Beaumont and Dufrenoy's defence of the craters of elevation' | [c.1830] | |