The Rev. T. Watt Leggatt served as a Presbyterian missionary on Malekula, New Hebrides (Vanuatu), for about 25 years from 1887. See Patrick O'Reilly's 'Bibliographie des Nouvelles Hebrides' (Paris, 1958) for details of his published writings.

The diary gives a day-by-day account of Leggatt's work as a missionary in the New Hebrides. See also PMB MS 87.