He credits the answer to the "French orientalist, Henrion, member of the Academy," who, in Baring-Gould's words, "fixed it with a precision satisfactory, at least, to himself."
Henrion's table, as Baring-Gould gives it.
Baring-Gould names no work by Henrion and gives no date for the table.
The source for the table on this page is Baring-Gould's chapter, not Henrion's own writing.