Who is who in this 1903 Carnegie Museum photo?

In a paper that I’m just finishing up now, we want to include this 1903 photo of Carnegie Museum personnel:

A few weeks ago I asked for help on Twitter in identifying the people shown here, and I got a lot of useful contributions.

But since then I have seen the Carnegie photo library catalogue for this image (it’s #1010), and it gives names as follows:

• Far left, mostly cropped from image: field worker William H. Utterback
• Seated, facing right: field worked Olof A. Peterson
• Standing at back: preparator Louis Coggeshall (Arthur’s brother)
• Seated, looking to camera: preparator Charles W. Gilmore
• Seated at far table: field worker Earl Douglass
• Standing behind far table: chief preparator Arthur S. Coggeshall
• Sitting at far table, facing left: preparator Asher W. VanKirk
• Seated: illustrator Sydney Prentice
• Sitting on bench: John Bell Hatcher, whose description of Diplodocus carnegii had been published two years previously

Those of you who know a bit of history, do these identifications seem good? Some of the suggestions I got align well with these, but others do not. For example, a lot of people thought that the person here identified as Louis Coggeshall was his better-known brother Arthur.

I’d appreciate any confirmation or contradiction.