I found this online recently with the following caption...
In this edition of the Edwin O. Smith School yearbook from Storrs, Connecticut, future Monkee Peter Thorkelson is pictured holding his French horn on page 22 as a member of the concert band, again on page 29 as a staff member of "Stuff," the school's humor magazine, and finally, in his senior picture on page 49, where he is listed as being accepted at Carleton College.
In Memoriam: Michael Nesmith
Dolenz sings Nesmith - The EP
Micky Dolenz Live!