The text reads:
John Muir
California
Statehood Sesquicentennial
Famous Californians - First Day of Issue - Sacramento, CA
This cachet is by Cuv Evanson Cachets, combining the 1964 John Muir stamp with a 2000 California Sesquicentennial stamp.
The image of John Muir is the top two-thirds of the painting by Orlando Rouland from the National Portrait Gallery, Smithsonian Institution, Washington, D.C.
Muir has subsequently been honored with a 32 cent postage stamp in 1998.