Arthur F. Baumhoff operating a Caterpiller tractor ahead of one of his dredges owned jointly with E. T. Fisher near Centerville, Idaho. Note close connected bucketline dredge in the background.
The contents of manuscript collection MS 474 (Arthur H. Hays) were transferred to MS 574 in 1995. The collection now contains 6 boxes, box- 1-4 personal papers and photographs, box 5 - Kuna history and box 6 - oversize photos.