Wade Stevenson lived in Othello, WA and worked for the Milwaukee Road from 1945 until the Abandonment..
He died in 2006, His huge photo collection was donated to the Milwaukee Road Historical Association, The MRHA decided that since the collection was so large there was no way they could properly handle the collection, so they split up the collection, they distributed the non - Milwaukee Road photos to their respective Railroad Historical Societies.
The NPRHA received approximately 4000 images, which were scanned by a outside vendor, The resulting digital images were processed, the file names were standardized, the images labeled, and entered into a database.
Apparently he did have day books that he kept notes in, but they are missing.
Most of the images that the NPRHA received are B&W negatives and appear to be shot on 616 sized film, this gives a image area of 2 1/2 x 4 1/4 inches, some of the later images appear to be shot on 120/220 film 2 1/4 x 3 1/4.