see also Geological Museum - click here
GEOLOGICAL SOCIETY OF LONDON, SOMERSET HOUSE. Established 1807. The Museum of geological specimens, fossils, &c., not only British, but from all quarters of the globe, is extensive, though not perfectly arranged. It may be seen by the introduction of a member. The museum and library are open every day from 11 to 5. The number of fellows is about 875, and the time of meeting half-past 8 o'clock in the evening of alternate Wednesdays, from November to June inclusive. The Society has published its transactions, which now adopt the form of a quarterly journal. Entrance money, 6 guineas; annual subscription, 3 guineas.
Peter Cunningham, Hand-Book of London, 1850
GEOLOGICAL SOCIETY OF LONDON, Somerset House, instituted in 1807: 900 members (F.G.S.); entrance fee, 6l. 6s.; annual subscription, 2l. 2s. The Museum contains an extensive collection of fossils and geological specimens from all parts of the earth. Both Museum and Library are open to the visitor on introduction by a member. The Society meets at Burlington House on alternate Wednesday evenings (at 8 p.m.), from November to June, and issues, quarterly, a journal of its proceedings.
Cruchley's London in 1865 : A Handbook for Strangers, 1865