The Hon. William H. Clagett, as delegate from the Territory most directly interested in the passage of the bill, took an active personal part in its advocacy from beginning to end. Through the efforts of these three gentlemen, and others less conspicuously identified with the work, this measure received perhaps the most thorough canvass of any bill that has ever passed Congress. All the members were personally visited and, with few exceptions, won to the cause. The result was a practical unanimity of opinion when the measure came to a vote. This first took place in the Senate, the bill being passed by that body January 30th. It was warmly supported upon its passage by several members and opposed by one, Senator Cole, of California; a fact the more remarkable because that Senator had in his own state--in the preemption by private parties of the Yosemite wonderland--the most convincing example possible of the wisdom of such a measure as that proposed. The Senate bill came up from the Speaker's table in the House of Representatives, February 27th. Mr. Dunnell stated that the Committee on Public Lands had instructed him to ask the House to pass the Senate bill. Hon. H. L. Dawes, of Massachusetts, warmly advocated the measure, which was then passed by a decisive vote.[AG] The bill received the President's signature March 1, 1872. [AG] No yea and nay vote was taken in the Senate. The vote in the House was--yeas, 115; nays, 65; not voting, 60. This subject has been treated somewhat in detail because there has long been a false impression among the people as to who it was that first put forward this important project. To no individual is the public more indebted for the creation of the Park than to Dr. F. V. Hayden, who was long prominently connected with the geological surveys of the government. But he did not, as is generally supposed, originate the idea. His statement in his report for 1878, Vol. II, p. xvii, that, "so far as is now known, the idea of setting apart a large tract about the sources of the Yellowstone River, as a National Park, originated with the writer," is entirely erroneous; and there is the less excuse for the error in that Dr. Hayden had himself heard the measure advocated by Mr. Langford in his Washington lecture. In fact, he is known to have said in later years, only a short time before his death, while residing in Philadelphia, that when the project was first talked of among the members of his party, in the summer of 1871, he personally disapproved it because he doubted the practicability of adequately guarding so vast a region; but that, upon further reflection, he became converted to the measure and was thereafter its most ardent advocate.