Mr.Moran has been identified as a painter of the Grand Canyon ever since 1873, when he went there with one of Powell's parties and made sketches from the end of the Kaibab Plateau which afterwards resulted in the splendid picture of the Grand Canyon now owned by the Government.
I am indebted to Prof.A.H.Thompson for the use of his river diary as a check upon my own, and also for many photographs now difficult to obtain; and to Dr.G.K.Gilbert, Mr.E.E.Howell, Dr.T.Mitchell Prudden, and Mr.Delancy Gill for the use of special photographs.

Other debts in this line I acknowledge in each instance and hence will not repeat here.

I had hoped to have an opportunity of again reading over the diary which "Jack" Sumner kept on the first Powell expedition, and which I have not seen since the time of the second expedition, but the serious illness of Major Powell prevented my requesting the use of it.
F.S.Dellenbaugh.

New York, October, 1902.
NOTE .-- Since the last edition of this work was published, the inquiries of Mr.Robert Brewster Stanton have brought to light among some forgotten papers of Major Powell's at the Bureau of Ethnology in Washington the diary of Jack Sumner and also that of Major Powell himself.

Both begin at the mouth of the Uinta River.
Major Powell, because of his one-armed condition, had the only life-preserver.