Scans of Aven Nelson collecting field books. This section dates from 1898 and contains records 4297-5379. (Actually contains record numbers 4297-4400, 4482-4500, 4842-5399.) This book has Elias Nelson's name on the front cover but probably belongs to Aven Nelson. Inside cover says Book 6. Elias Nelson was a helper.
Manuscript originals available at the University of Wyoming.