According to William Greener, father of WW, in "The Gun, 1834" Stub Twist was made of a mixture of horseshoe nail stubs (pulled from the hoof when re-shoeing) & chopped coach springs, the pieces being cut to about the same size as the stubs. The entire mass was placed in a cruciable, throughly mixed, then heated to a welding heat where a ball of the mixture would be pilled out on the end of an iron bar & welded into a bar of suitable size. This would then of course be wound around a mandrel as for other welded bbls. If it was twisted in the bar prior to winding then it was called Stub damascus. Even in 1834 William was bemoaning the increasing use of cast nails for horseshoes which were unsuitable for bbl making. A stub twist bbl made in this manner thus shows a spiral pattern, but consists of many small pieces rather than the continous spiral of "Plain Twist". Lefever referred to the bbls on their H grade as "London Twist" & they have the exact appearence of that in Drew's picture. There is no indication to me that either the bbls in question or the Lefever H bls etc are twisted in the bar, thus would not fall into the category called "Damascus Twist". My understanding of the term "Crolle" was that it was twisted in the bar & was thus a type of Damascus.
