Letter from Henry Thomas Colebrooke to Nathaniel Wallich concerning publications that Colebrooke will forward to Wallich. He reiterates his request to send specimens direct to the Geological Society because of the cost incurred at the Custom House. Handwritten, dated 12 March 1821, received 30 August 1821.

Letter from Henry Thomas Colebrooke to Nathaniel Wallich in which he confirms the remittance for the Botanic Library by the East India Company Court of Directors. Colebrooke is on board boat headed for the Cape where he will stay a short time before returning to Europe. Dated 18 December 1821, received 24 March 1822.

Letter from Henry Thomas Colebrooke to Nathaniel Wallich from Cape of Good Hope. Colebrooke has been more concerned with matters to do with his landed property than with botanical matters but has gathered some geological specimens. He requests that Wallich send seeds to the Cape to James Gosling, that he thinks might be profitable for the region. Handwritten, dated 12 March 1822.

Letter from Henry Thomas Colebrooke to Nathaniel Wallich concerning how the terms for distribution of plants and seeds is nearly agreed and that Colebrooke reports Wallich's friends are eager to receive their share. Colebrooke is petitioning for Wallich to have an assistant. Colebrooke is pleased that Wallich is pursuing introducing plantations of Sipos timber. In a postscript Colebrooke promises to send an account with Richardson's bill but meantime could Wallich return the first account as Colebrooke has mislaid his copy. Handwritten, dated 10 January 1824, received 19 May, 1824.

Letter from Henry Thomas Colebrooke to Nathaniel Wallich to ask Wallich whether he would like the earlier volumes of the Geological Transactions to complete his set as they are available at modest terms. Colebrooke and Mr Lambert have had an interview to request an assistant for Wallich but, as yet, do not know the outcome. The specimens that Wallich sent are still undistributed and therefore Colebrooke suggests that Wallich apportions them to men of science in future. In a postscript Colebrooke mentions that Richardson is still sending publications to Wallich. Handwritten, dated 30 March 1824, received 29 September 1824.

Letter from Henry Thomas Colebrooke to Nathaniel Wallich in which Colebrooke thanks Wallich for his report on his journey to the Tipoo forests. He would be glad to see maps that Wallich has promised and the map that should have accompanied Gerard's Journal has not arrived at India House. This Journal has furnished a paper for the Transactions of the Royal Asiatic Society. He has yet to see Wallich's Tentamen Florae Nepalensis and will happily receive a copy from Wallich. He reassures Wallich concerning his reputation but adds that nothing, as yet, has happened at India House concerning appointment of an assistant. He discusses furlough and provision of publications. Handwritten, dated 21 February 1826, received 28 June 1826.

Letter from Henry Thomas Colebrooke to Nathaniel Wallich. Colebrooke hopes that Wallich has returned from his Eastern excursion In good health. He writes that Wallich communication from Rangoon provided evidence of what may be found there. He discusses Richardson and whether to transfer Wallich's business to another bookseller. He thanks him for all his communications and adds that the copies of Wallich's Tentamen that Colebrooke received have been distributed as Wallich suggested. Handwritten, dated 15 March 1827, received 14 September 1827.