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Letterhead Cambridge, Mass., 24 Mah. 1878. John Muir Esq. San Francisco, Cal. Dear Sir I have read and reread your
valuable and highly interesting article on the Humming Bird of the Cal. Water Falls in Scribners and you have indeed added
a valuable contribution to the history to that interesting species which I hope some days to make the acquaintance of. I enclose
a prospective of the Bulletin and we should be pleased to add your name to our list of subscribers -