It seems that you have this information from reading your post but just in case you didn't have all these articles I thought I would post it.
The Oregonian (Portland, OR) March 9, 1876 Page 3 Eugene City Items Considerable sensation has been created by the report that John Craig, the Ochoco mail carrier has been frozen to death. The mail carrier on this end of the route delivered the mail to him at Belknap's on the 3rd of February, since when nothing has been heard of him. On the 29th, Messrs. Renfrew and Sims started in search of him, but Mr. Sims, being without glasses was snow blind, and there were compelled to return. A party started again last Monday. Mr. Craig was an old mountaineer, and well acquainted with the route, but from his long absence it is feared he has perished.
The Oregonian (Portland, OR) March 15, 1876 Page 3 Eugene City Items The partyin search of John Craig, the Ochoco mail carrier, found the remains of the unfortunate man in one of the cabins built along the route. From appearances, when about three miles from the cabin, he broke one of his snow-shoes, and for this reason he seems to have been completely exhausted on reaching the cabin. He went down the chimney, as the snow was so deep that it was his only mode of ingress. He endeavored to make a fire, but his matches were damp , and failing, had lain down in the fireplace covered with his blankets, where he was found. The party having no means for removing the remains, and the ground being rocky and frozen, buried the corpse in the snow. The deceased was unmarried and about 50 years of age.
The Oregonian (Portland, OR) March 18, 1876 Page 3 Communication McKenzie Bridge, March 12, '76 Ed. Journal- Our worst fears with reference to the fate of John T. Craig are realized. His body was found by Messrs. B. F. Flynn and Peter Wycoff on the 7th inst., in the center cabin on the summit of the Cascade Mountains, where he had evidently perished of exhaustion and cold about Feb. 7th. Circumstances seem to prove that he had broken his snow shoes within two miles of the cabin on the evening of the 6th of February; he was 24 hours wallowing through the snow, in reaching the cabin, where he had built one fire, in front of which he had spread his blankets and slept until his fire was burned out, he had then arose, and failing to rekindle his fire, is a state of semi-consciousness laid down in the hot ashes, and drawing a blanket over him and yielding to the subtle influence of the cold had slept to wake no more. The thanks of his friends are due to the above mentioned gentlemen, also Messrs. P. C. Renfrew and J. W. Simms for their herculean efforts to probe the mystery of his absence. A. S. Powers