The text reads:
"John Muir, 1838-1914
Influenced the establishment of Yosemite National Park and the preservation of giant sequoia trees.
Naturalist, Explorer
First Day of Issue"
Cachet depicts a portrait of John Muir and a sketch of a glacier identified as Muir Glacier, Alaska.
This first day cover is also available with an additional postage stamp depictin noted university educator Mark Hopkins.
Muir has subsequently been honored with a 32 cent postage stamp in 1998.