[ Sir Joseph Prestwich, geologist. ] Autograph Letter Signed to 'Gustave', i.e. Victor Gustave Plarr, regarding 'Pebbles of white quartz'.

3pp., 12mo. Bifolium. In fair condition, lightly aged and worn. He thanks him for a copy of his 'papers', 'though I regret to say they are sealed books to me'. He explains how 'Pebbles of white quartz are originally derived from veins in the metamorphic rocks by marine action. They may occur in any formation & are common in many.' He describes the locations where they are to be found, before sending his and his wife's regards to Plarr and his wife.