It is hard to say which of these is greater or which was nearer his heart.

Together they constitute a far-reaching influence in the development of the country such as no one man heretofore has contributed.

His Studies and recommendations with regard to the arid lands of the West are of the greatest importance to that district and to the country at large and the nearer they can be carried out the better will it be for posterity.

He perceived at once that the reservation of sites for storage reservoirs was of the first importance and this was one of the earliest steps he endeavoured to bring about.
Of late years when he might have relaxed his labours, he turned his attention to the field of psychology and philosophy, working till his malady, sclerosis of the arteries, produced his last illness.

The result was two treatises in this line.