Hello GlassIsGood - You may find the following of interest.............
Glass decorated with the (usually) boys and girls plus period scenery etc. may or may not have been decorated by 'Mary Gregory'. It is believed that this lady worked as a decorator at Boston & Sandwich Glass Co. in the States in the 1870's and 1880's, however there has been some rumour over the years as to whether she existed at all! According to R. W. Miller, who did publish a book on the subject he claimed to have two photographs of this person, and she lived apparently from 1856 to 1908. Nonetheless, it would have been impossible for her to have knocked out all of the material attributed to her, and in fact this style was thought to have also been produced here - but was certainly churned out in Bohemia and in Austria. In view of the amount of travelling that glass does make, I guess it would be nigh on impossible to be certain from whence any individual piece originated. Usually in white enamel only, apparently in the last years of the C19 the figures were given coloured feet and hands, and this may or may not affect value. Most of what appears now in the U.K. has probably originated on the Continent somewhere. BUT beware, this style was certainly made up until quite recent years, and you will need an expert to sort the wheat from the chaff. Suggest you go to a glass dealer who specialisesin this material.

Reference: 'The Arthur Negus Guide to British Glass - Hamlyn - 1981.