the newcomer was plainly a military officer of some rank ; an aviator , by his long sweeping coat of leather gorgeously embroidered around the borders , and by the short-trimmed hair that set the turkish aviators apart from their turbaned fellows ; and a gifted one , by the sparkling jeweled chelengk upon his chest , a singular mark of honor among the turks , rarely bestowed , which laurence recognized from its having been granted lord nelson after the victory of the nile .