No Webley guns on either page, nor any screw grips.
Check out the third fastener on the W & C Scott on page 19..picture 196
No screw grips. Greener cross bolt and a Jones UL.
On page 24 on one of Scotts cheaper hammer guns there appears to be a dolls head with a screw grip.
Falling block single shot on that page. If whatever page you're looking at has a Scott hammergun, it won't have a screw grip. Scott didn't use them.
One thing I am sure of those Evans originally posted were not common screw gripped actioned back locks.
Actually, they are. Those Evans are Webley W & R 1st models illustrated on the bottom half of page 20.
You've really gotten confused somehow, which isn't hard with the Scott/Webley guns after the merger. The screw grips were Webley's invention, not Scott's, and Scott guns didn't use them. After the merger in 1897, the W & C Scott and P. Webley lines were kept distinct right up until the Scott line was discontinued in the 1930s. Look at the catalogue. The Scott guns appear under "W & C Scott & Son's Specialties" and the guns were marked "W & C Scott & Son". Webley's line appears under "Webley & Scott Ltd." after the merger, and were usually marked "Webley & Scott". That's the easiest way to distinguish the Webley from the Scott models. The screw grips were only used in Webley's line, never Scott's.