| Description | Comprising:
Printed table-'Comparative view of the various standards commonly used by geographers to express vertical distances', n.d.
List by Peggy Greer headed 'papers about my geographical scale', 1849.
Twelve letters from various correspondents:
De Morgan, Augustus, 1849
Drach, S M (2), 1849-1850
General Survey and Valuation of Ireland to P Colthurst, 1850
Greenough, George Bellas (draft) to ?, 1849
Greer, Peggy to ?, 1849
Herschel, Sir John Frederick William, 1850
Malcolm, Sir Charles to P Colthurst, n.d.
Murchison, Sir Roderick Impey to P Colthurst, 1849
Royal Geographical Society (2), 1849-1850
Royal Institution, 1850. |