Miss Nightingale began her Irrigation campaign with an appeal to Lord Salisbury, and she approached him on a point which she thought would be common ground. She knew that he was of a scientific turn of mind, and hoped he would agree with her that the first thing needful was to obtain complete and trustworthy statistics. She sent him some tentative figures as to the cost of irrigation works already carried out, and the financial results accruing therefrom, confessing, however, that she had experienced great difficulty in obtaining the figures. "I have been too long on the search for such returns myself," he replied (May 10, 1875), "not to sympathise with your distress." He proceeded at some length to enumerate "the difficulties in the way of a really rigorous exhibit," and to state the questions which seemed to him still unsolved with regard to irrigation in general; for instance, "Is irrigation," he asked, "the creation or merely the anticipation of fertility? Does it make vegetable wealth, which but for it would never have existed, or does it crowd into a few years the enjoyment of the whole productive power of the soil?" Meanwhile he had her figures submitted to critical annotation at the India Office, directed various Papers to be sent to her, and promised to see whether fuller returns could be obtained. As nothing definite resulted, Miss Nightingale suggested the appointment of a Committee or Commission to investigate and report. The suggestion elicited a characteristic reply from Lord Salisbury. "As for a Commission," he wrote (Nov. 1, 1875), "I doubt its efficiency. Commissions are very valuable to collect and summarize opinion, and they are often able to decide one or two distinct issues of fact. But they are too unwieldy for the collection and digestion of a great variety of facts and figures. With the best intentions, their work is slow and _routinier_, and in their report they gloss over the weak places with generalities.... As a rule, administrative force is in the inverse proportion of the number of men who exercise it. One man is twice as strong as two; two men are twice as strong as four. Boards and Commissions are only contrivances for making strong men weak."