Presumption as to signatures: In any proceeding under this Act, any application, certificate, warrant, reply or other
SECTION 140: Presumption as to signatures: In any proceeding under this Act, any application, certificate, warrant, reply or other document purporting to be signed by an officer in the service of the Government shall, on production, be presumed to have been duly signed by the person by whom and in the character in which it purports to have been signeduntil the contrary is shown.