Lefroy was devoted to Switzerland, and he was one of the summer chaplains of the Intercontinental Church Society annually from 1867 to the year of his death. From 1875 to 1878 he was a member of the Alpine Club, but although fond of mountain climbing made no great expeditions. He helped to build the English churches at Zermatt, Riffelalp, Gletsch, and Adelboden. Lefroy was twice married. By his second wife, Mary Ann, daughter of Charles MacIver, of Calderstone, Liverpool, whom he married at Malta on 11 February 1878, he left two daughters. One of them was the wife of Sir Percy Bates, fourth baronet.
^Amongst others he wrote “Plea for the Old Catholic Movement”, 1875; “Pleadings for Christ”, 1878; “The Christian Ministry”, 1890; “Immortality of Memory”, 1898; “Christian Science contrasted with Christian Faith and with Itself”, 1903 > British Library Catalogue accessed 18:20 7 July 2009 GMT
^Lefroy , William(1836–1909)’, Oxford Dictionary of National Biography, Wellings,M. (Oxford, Oxford University Press, Sept 2004) ISBN 0-19-861411-X