Jack Dover
If you watch closely, you would figure this particular one has a different way of connecting front legs to the sides. The leg is glued to the lower third of a side panel, so in theory there's enough length for a side panel to move. Phil's side panels are mortised in a leg, so they're mechanically constricted.

There's still cross-grain glue up on that table. There are glue blocks that have a screw, there's this front batten which seems to have grain running vertical, so the original question remains, but at least we can suspect they were already concerned with grain movement in those days.