Scope and Contents Letter to Sir Charles Lyell from Carlo Gemmellaro answering a list of questions that Lyell had evidently posed to him in a previous letter. Topics covered include volcanic strata, inaccuracies in maps of the area around Mount Etna drawn by Wolfgang Sartorius Von Waltershausen, and Lyell's theory that the 2 craters of Mount Etna were contemporary. Gemmellaro disputes this theory as each crater ejected different types of rock, Felspatic and Pyroxenic, with no mixing of the two. Gemmellaro...

Scope and Contents Notebook of discussions, reading, drawings and copy letters (in Mary's writing) made whilst with Hartung at Swingenberg, Germany. Appears to be working through a previous publication, making revisions or notes, especially on volcanoes, lava slopes, elevations and upheaval. Many pages written in pencil. Blank from page 89 onwards. This notebook has no index. p. 1 Begins at Swingenberg with Hartung. Discussion of Azores. p. 4 Scrope's Volcanoes p. 8 Erratics p. 11...

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Map of Mount Etna in Sicily showing the main crater, the Val del Bove and the Montagnuola amongst other features. c1857.

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Map of Mount Vesuvius, Italy, showing the crater and several other geological formations, c1857.

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Watercolour sketch of the crater of Lagoa in Madeira, 1850s.