I received a second email from the seller who confirmed that the "male" sulphide is James Garfield and noted that the four assassinated presidents paperweights pay tribute to: Abraham Lincoln - who was assassinated by John Wilkes Booth; James Garfield - who assassinated by Charles J. Guiteau; William McKinley - who was assassinated by Leon F. Czolgosz; and John F. Kennedy - who was assassinated by Lee Harvey Oswald.
He also wrote that "as for Ike and Mamie, they, too, were produced in 1972. We see Ike relatively often, but Mamie is very rare. The only other female 'sulphide' by St. Clair of which we're aware is Betsy Ross. That Ross weight isn't a cameo, but almost a cartoon or 'precious moments' type figurine of Betsy sewing the American flag. It too is rare, but not as rare as Mamie in our experience."
Seller also wrote that "as someone who shares your passion for glass (especially paperweights) I applaud your efforts at scholarship. There are many areas of this hobby which are inadequately documented, and a great deal of information which has been (and continues to be) lost, as more and more of America's great glass factories disappear, with very little fanfare or concern from the public."
Frankly, this seller has offered more information than Joe Rice decided to convey. There really must have been bad blood in that family or just so much sadness at the passing of the St. Clairs (Joe, Bob, and Maude) in the 1980s that discussing the company and the family is just too difficult.
And, as I wrote before, perhaps he is writing a book. Now, that would be nice.
Anyway, it's good to have confirmation about whom the two sulphides depict. And it's nice to know the Mamie is rare. On eBay right now are McKinley and Garfield sulphides as noted in other posts. And, of course, the importance of glassmakers signing and, hopefully, dating their works can't be stressed more strongly.