Yes Chris, I have perused that myself. Interesting observations on the Belgian coticules and the Thuringan stones too. Somewhere in there if my memory is correct I understood them to say that the abrasive content of the coticule is equal to the Arkansas but the binder is too soft for cutting tools such as chisels or planes.

Lucky for us that the coticules and Thuringans are just right for razors. When they mention these obscure stones like the Turkey among others and talk about how highly regarded they were I get curious to try one. Like any normal person.