There is a prayer in Church Latin that goes: ...NOS [object of ADMITTE] ...LARGITOR [nominative, = pardoner] ..ADMITTE. The addressee is being asked to admit the suppliant to a (previously mentioned) group, while acting as a pardoner. It is the ‘while acting as’ that interests me; he could have put ENS I suppose, being Late Latin, but it is just implied. Is there a grammar that mentions this construction? I failed to find it in Kennedy, or Allen & Greenhough.