The necessity for a reliable investigation into the mortality experienced by life tenants under reversions has long been felt.

So far as I am aware, the only published experience is that given by Mr. Neil Campbell in a paper read before the Faculty of Actuaries in 1902 (T.F.A., vol. i, p. 79), although doubtless individual offices have at various times examined the mortality in respect of their own purchases. The investigation by Mr. Campbell was of considerable service in indicating the trend of the mortality, but was unfortunately of limited value inasmuch as it was based upon only 226 lives producing 2,097 years of exposure to risk.