Letter from John Bobanau Nickerlieu [Nickterlien] Hennessey, Mussoorie to Edward Sabine Hennessey expresses his willingness to carry out any scientific experiments as directed by Sabine during his ‘leisure hours’. Reference to ‘the experiments for determining the direct evaporation of a water surface’. Refers to the readings of ‘two maximum thermometers placed one in the shade, the other in the sun’. Hennessey thanks Sabine for his efforts to obtain a ‘first class telescope’ for Mussoorie, and discusses a ‘qualified’ observer and the mounting of the instrument. 21 October 1866