Born at Birmingham, 13 February 1864, the fifth son and youngest child of William Prime Marshall, a civil engineer, and Laura Stark, his wife, who was a niece of James Stark, the artist. His father was for many years secretary of the Institute of Civil Engineers and was an enthusiastic naturalist. H

Born in London on 2 October 1865, the eldest son of Dr James Scott Sequeira and Maria Rosina Rackwitz, his wife. He belonged to the sixth medical generation of his family in direct paternal descent. His great-grandfather, in the third medical generation, Isaac Henrique Sequeira, MD Leyden 1758, LRCP