Hieroglyphics of Horapollo: Book I: XXV. How They Denote ...
Hieroglyphics of Horapollo, tr. Alexander Turner Cory, [1840]
To denote an imperfect man, they delineate a FROG, because it is generated from the slime of the river, whence
it occasionally happens that it is seen with one part of a frog, and the remainder formed of slime, so that should the river fall, the animal would be left imperfect.
II. Kneph.