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Grumpa, you might find a two-part article in Man At Arms magazine to be helpful. Part 1 covers the S&W 1917 and part 2 covers the Colt. They are:

Volume 21 # 6 from Nov/Dec 1999 for part 1 (S&W) and

Volume 22 # 1 from Jan/Feb 2000 for part 2 (Colt's)

They are available as back-issues at the following website: Man at Arms Magazine for the Gun and Sword Collector Back Issue List

 

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Haggis, the Man At Arms articles I mentioned cite both Murphy and Pate among thei source material.