I think you need to interpret that book carefully, Roger. The history of the Stourbridge area glass factories is very complex. There were various members of the Richardson family engaged in glass making from about 1830s onwards, first as Webb & Richardson, later as the Wordsley Flint Glass Works. The book you have seen is probably referring to H G Richardson & Sons, who ran from around 1870 to 1930. They are the ones whose catalogues show some paperweights around the turn of the century.