HP….do you have a copy of The Complete Book of Fruit Growing in Australia by Louis Glowinski? It is well worth the money.
On page 70 it says of Reine Claude de Bavay: Mid season; Fruit are large rounded dull green or pale yellow with white spots, occasionally red spots in warm seasons. Very rich gage flavour. Tree is small. Raised by one of Napoleon’s cavalry officers, Major Esperin, also known as a pear breeder; Said to be self fertile but don’t rely on that. Also an unreliable cropper, so perhaps interplant with Grand Duke.
The other one is not in this book. The other gages listed are Jefferson, greengage, Cole’s golden gage and Coe’s golden drop.
But seriously, this book is extremely well researched, a brilliant read on its own (when I got it, I read it cover to cover, like a novel) and chock a block with pretty much all the information you could ever need.