The heir of the heavily encumbered Greshamsbury estate. By his mother Lady Arabella, and her De Courcy relatives, he was considered to be bound to rehabilitate the family fortunes by a wealthy marriage. His love for Mary Thorne very greatly distressed his family until she was discovered to be the heiress of the great Scatcherd property.

"The Greshams from time immemorial had all been handsome. They were broad-browed, blue-eyed, fairhaired, horn with dimples in their chins, and that pleasant, aristocratic, dangerous curl of the upper lip, which can equally express good-humour or scorn. Young Frank was every inch a Gresham". - Doctor Thorne