Letter to Harvey Cushing from Henry Barton Jacobs, 11, Mount Vernon Place West, Baltimore, Maryland, USA. Jacobs provides details of the famed Dismal Swamp expedition with Osler and Futcher in April of 1900. Osler recorded his famous story of the swamp in a copy of Burton's Anatomy. Jacobs writes of affairs at the Johns Hopkins regarding MacCallum and McRae.