John Muir


[Joseph] Le Conte


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objections, & report A week ago I made a discovery wh is of great interest to me & doubtless will be to you. Two yrs ago when I just crossed the basin of Yosemite Creek I observed what appeared to me as a portion of a moraine leveled & changed by water. About a month ago I was upon Mt. Hoffman & discovered the basin of a small tributary glacier which joined the Dana glacier a mile or two this side of Lake Tenaya On my return to the valley I crossed the Yosemite creek & discovered still more satisfactory indications of a glacier wh must have filled the Main Yo- semite creek basin flowing at right angles to the later& larger ones of the summits Now there is a deep canon on the left side of the Yo Sem' falls that has compelled me to think to it for more than a year & I could not account for it in any other way than by supposing the existence of a glacier in the basin above as one of the conditions. Last Sabbath the big truth came to the birth. I ran out of the valley by Indian Canon & around to the top of the falls, - said my prayers in the irised spray, & after baptism & the eating of a piece of bread started northward for the head waters of the stream full of faith, confident that some- where I should find positive evidence of my missing glacier, perhaps in the higher portions of its channel where it would linger longest, or where it had been compelled to wedge through some narrow place, or perhaps some moraine might still exist in some [3]



Date Original

[1871] Jul 10


Original letter dimensions: 20 x 26.5 cm.

Resource Identifier


File Identifier

Reel 02, Image 0481

Copyright Statement

The unpublished works of John Muir are copyrighted by the Muir-Hanna Trust. To purchase copies of images and/or obtain permission to publish or exhibit them, see

Owning Institution

University of the Pacific Library Holt-Atherton Special Collections. Please contact this institution directly to obtain copies of the images or permission to publish or use them beyond educational purposes.

Copyright Holder

Muir-Hanna Trust

Copyright Date


Page Number

Page 2


John Muir, correspondence, letters, author, writing, naturalist, California, correspondent, mail, message, post, exchange of letters, missive, notes, epistle