In September 2007 Laura Guedes processed and added 2.0 c.f. of materials to this manuscript group. These materials were donated to the University of Idaho Library by the Simpsons on four occasions between 1984 and 1987. The materials in these four accessions were combined and have become an addendum to Manuscript Group 115. All materials in this section are classified into the four Series established in the previous inventory. They are conditioned in boxes 4 and 5.

All the photographs are identified and numbered consecutively, following the order of the photographs identified in the previous inventory, from 318 to 662. The negatives have been listed but not numbered.