Frog in Your Throat lozenge company advertising Postcard 
Their slogan was "Innocent and Instantaneous" refreshment with Gibson Girl and Frog 
Private Mailing Card  "Authorized by act of Congress - May 19, 1898"
5 1/2 X 3 1/2". copyright 1905
No postage or postmark, Hand written note in pencil on back. Irregular cut - see photos for details.