Mahlon W. Hessey Member 410-342-9800 phone410-342-7401 fax Email Mahlon W. Hessey › About Mahlon W. Hessey Delta Theta Phi. Lecturer on: Corporation Law, 1962 – 1970; Legal Research, 1960 – 1962, University of Baltimore School of Law. President, Junior Bar Association of Baltimore City, 1963 – 1964.