From
La Chasse Au Fusil An Essay On Shooting (An English adaptation of Marolles' original)
Gervis Francois Magne’ de Marolles 1789
http://books.google.com/books?id=-Q0AAAA...ary_s&cad=0"The Canons a’ ruban, or ribbon barrels, of the French, resemble very much the English twisted barrels (but are of a different process.)
A plate of iron, about the twelfth part of an inch in thickness, is turned round a mandril, and welded its whole length, in the same manner as a plain barrel. Upon this small and light barrel, which is called the lining (chemise), a stripe of plate iron, about an inch in breadth, and beveled off a the edges, is rolled in a spiral direction, by means of successive beats; this spiral is termed the ribbon, and its thickness much correspond with the part of the barrel it is to constitute. As a ribbon of sufficient length to cover the lining from one end to the other, would be very difficult to manage, it is formed in several pieces, and as soon as one piece is nearly rolled on another is welded to the end of it, and the operation continued until the whole of the lining is covered. The edges are beveled so much, that one edge overlaps the other about a quarter of an inch. When the ribbon is rolled on, the barrel is heated by two or three inches at a time, and the turns of the spiral united to each other and to the lining, by being welded in the same manner as a twisted or a plain barrel. It is afterwards bored so that almost the whole lining is cut out, and scarcely anything left except the ribbon with which it was covered."
p. 43 "An ingenious workman called Barrois, formerly established at Paris, and but lately dead, having considered the estimation in which ribbon barrels were held, invented a new form,
which he called wired barrels. His method was this. Upon a thin barrel, forged, filed, and drilled as usual, he rolled, in a spiral direction, and as closely as possible, a tempered iron wire, about the thickness of a crow quill; the first layer covering only the fortified or reinforced part . The turns of the wire were folded to each other, and to the barrel, with a particular composition he kept secret. He then filed the wired part as to render it smooth and bright, but not so much as to weaken it; and applied a second layer of wire, which covered the first, and extended two-thirds of the length of the barrel; the second layer being soldered like the first, he added a third that covered the first two, and reached quite to the muzzle."
Wire Twist refinished by Paul Stevens
The barrels are Plain Twist
Dr. Gaddy's English Skelp example
Dr Gaddy's Belgian Twist or
Conons Tordu or
Tors Ou Torches 
Paying attention this time jOe?
