 The statutes of Roger de Moulins (1187) deal only with the service of the sick; the first mention of military service is in the statutes of the ninth grand master, Fernando Afonso of Portugal (about 1200).In the latter a marked distinction is made between secular knights, externs to the order, who served only for a time, and the professed knights, attached to the order by a perpetual vow, and who alone enjoyed the same spiritual privileges as the other religious.The order numbered three distinct classes of membership