Heffernan, William Address: 9703 Overseas Hwy, Marathon, FL 33050 Phone: (305) 289-1853 Hours: Mon: 8am-5pm Tue: 8am-5pm Wed: 8am-5pm Thu: 8am-5pm Fri: 8am-5pm Lawyers Other Businesses: Joe's Pawn Shop at 6679 Overseas Hwy, Marathon, FL 33050 Keys Federal Credit Union at 12790 Overseas Hwy, Marathon, FL 33050 Margaret A Broz Law Office at 11400 Overseas Hwy, Marathon, FL 33050