The contents are as follows: Notebook, 1803, of John Rennie concerning machinery for sugar-mills in Trinidad and Guyana (MS.19817);

Correspondence, papers, and diagrams, 1805-1813, of John Rennie concerning mills, chiefly for sugar, for Jamaica, Trinidad, Barbados, and Demerara (Guyana) (MS.19818);

Correspondence, papers, and diagrams, 1814-1821, of John Rennie concerning mills, chiefly for sugar, for Jamaica, Trinidad, Barbados, and Demerara (Guyana) (MS.19819);

Notebook, 1795, of John Rennie concerning MacKonochie's wind sawmill at Bombay (MS.19820).