I had heard of this, but not of the "Foster" name.
My Virginia was obtained from Tom Butford in 2010. Tom was an orchardist and apple expert in Virginia. He is probably the person who dissimated this cultivar to cider makers all around North America. And I think his stock is the same as in the Jefferson Monticello orchard.
Tom also has a good part of "responsibility" for the revival of the Harrison apple by the way...
In 2022, I had my Virginia tested for DNA by Paul Kron of the University of Guelph. He sent me the following in an email email:
"“Virgina Crab”. I have tested a number of samples from Canada and the US labelled one of the following: ‘Hewe’s Crab”, ‘Hewe’s Virginia Crab’, or ‘Virgina Crab’. They have all been triploid and all have the same genotype (including yours). However, there is a bit of a complexity. Here is a summary:
According to the attached 1936 paper, ‘Virginia crab’ is actually a distinct variety from ‘Hewes’, and that ‘Virginia Crab’ is an offspring of ‘Hewes Virginia Crab’. ‘Virginia Crab’ is triploid. This is very interesting, because it would make sense that ‘Virginia Crab’ is a triploid while ‘Hewes Virginia Crab’ is diploid, because triploids typically arise from diploid parents. If they are distinct, as this paper says, and not interchangeable names for the same cultivar, then it raises the strong possibility that your trees, and the Ontario one I mentioned, are ‘Virginia Crab’, not ‘Hewes Virginia Crab’. Triploids labelled ‘Hewes’ may be incorrectly labelled."
And he added in another email:
"I noticed that in Dan Bussey’s book, ‘Hewes Virginia Crab’ and ‘Virginia Crab’ are treated as distinct, and it is noted that ‘Virginia Crab’ appeared in an orchard of ‘Hewes Virginia Crab’. This is consistent with the 1936 paper, although Dan’s book doesn’t mention ploidies. I think over the years people have become sloppy about the distinction."
So this makes a clear distinction between a diploid Hewes crab, and a triploid Virginia crab. With the latter being by far the most frequently seen, and probably being an offspring of the Hewes.
Now this is the first time I hear about the name Foster. But this obviously comes from further work conducted by the team of Gregory Peck. I imagine that Cameron Peace could also have been involved in this.
In any case, you can be pretty sure that the Virginia that you have is the same as the Virginia used by the US cider makers, and by Thomes Jefferson himself... So it is certainly not denuded of historical value. Plus it does have some merit for cider making, otherwise cider makers would not use it.
As of the original diploid Hewes, from most sources, no one alive has ever seen it for sure, or identified it.