Kitāb al-Kashf fī ʻilm al-ḥarf : manuscript, 1840

Written in one column, 23 lines per page, in black and red.

Historic Letter Collection, 1796-1940 (inclusive). 1844-1872. Joseph Dalton Hooker letters, 1844-1872

Historic Letter Collection, 1796-1940; Joseph Dalton Hooker letters, 1844-1872. HL Hook 1-3. Gray Herbarium Archives, Harvard University, Cambridge, Mass.