Typewritten letter signed by H. L. Mencken.  1524 Hollins St, Baltimore. "Dear Mrs. Portofee: It is a pleasure indeed to enclose two copies of my signature for your son.  I surely hope that he is making a good recovery from that heart condition.  I can well imagine how dreadful any disablement must be to an active boy of 16.  Measures 8.5" x 5.5". Comes with Certificate of Authenticity.