Wolffe & Co. in Walsrode, Prussia had a London agent, George Beutner, in 1892, then established The Walsrode Smokeless & Waterproof Gun Powder Co. in the U.S. in 1894.
Walsrode Gray 33 grain = 3 Dram; Green 30 gr. = 3 Dram.
A. Hillier and his Parker gun
https://books.google.com/books?id=lN...J&pg=PA228&lpg
I've never seen an ad for a black or smokeless powder "Chained Lightning"