Success - have just found that Achille Mansour (died 1889) was the composer of "Cours élémentaire de piano divisé en 3 livres" (1867, published by Girod, Paris - see http://catalogue.bnf.fr/ark:/12148/cb431301228), so this ties in with his collaboration with Nollet.
Incidentally, does anyone know of any other similar collaborations by composers to provide didactic materials for piano students?
Incidentally, does anyone know of any other similar collaborations by composers to provide didactic materials for piano students?