He also summarised his conclusions on this question in a lecture to the Aristotelian Society in the July of 1918.
Since the publication of _An Enquiry concerning the Principles of Natural Knowledge_ I have had the advantage of reading Mr C.D.

Broad's _Perception, Physics, and Reality_ [Camb.

Univ.

Press, 1914].

This valuable book has assisted me in my discussion in Chapter II, though I am unaware as to how far Mr Broad would assent to any of my arguments as there stated.
It remains for me to thank the staff of the University Press, its compositors, its proof-readers, its clerks, and its managing officials, not only for the technical excellence of their work, but for the way they have co-operated so as to secure my convenience.
A.N.