Hello:
Along with the advertisements in the December 1888 Pottery & Glass Gazette, there was also a letter from Edward Moore which in part states "We beg leave to inform you that by an arrangement with the Executors of the late Joseph Webb, Coalbourn Hill Glass Works, Stourbridge, we have become the proprietors of the whole stock of the moulds employed by that eminent Firm. These moulds are now in use here, and we enclose lithograph drawings of the leading articles..." So yes, we can document that Moore did indeed acquire the Webb moulds.
Sid