Okay Lynne this is what I found out. My expert told me to go to page 262 of the book The American Cut Glass Industry book by Jane Shadel Spillman. I'm just going to type exactly what it says in this book.
In 1898, Gorham changed the designation for silver-mounted wares to D. The D designs are recorded in a ledger book which lists the shape, the price and (about half of the time), the source of the glassware. The existing ledger book covers the period from February 1898 until December 1909. The companies most frequently listed as suppliers of glassware are the Hope Glass Works in Providence, TG Hawkes and Company, J. Hoare and Company and McCue & Earl in New York. A confusing aspect of this to a glass collector is that the Gorham design numbers were, of course, for the silver parts and they had no relation to the cut or engraved design on the glass. Therefore, two Gorham design numbers could be listed for the same glass blank with the same glass cutting or engraving, but with ounly slightly different silver parts. In mose cases, the D number is on the silver mount, near the Gorham mark.
Blanks were obtained from Stevens & Williams in England and some very simple blanks were ordered from Baccarat.
Fortunately, the Gorham archives at the John Hay Library of Brown University are extensive, and it is possible to chick some silver-mounted designs and find out whre Gorham purchases the glass. However, it is clear that Gorham was still using Hawkes blanks as late as 1916.
Lynne, your low bow definitely dates to 1908, because of the D to the left of the compass. I have looked in the Grand Prize Paris Exposition 1889 catalog of T. G. Hawkes & Company and found that your pattern is very similiar to the "Festoon" pattern but not an exact match. I'll keep on looking, but I'm thinking this is as close as we are going to get to identifying your beautiful piece. I have a Hope Glass Works catalog and a Hoare catalog, so if I find the pattern, I'll post it here. If you ever decided that you would like to sell it, please keep me in mind. I'd like to take it off your hands!!