Derby, Elias Hasket was born on September 24, 1803 in Salem, Massachusetts, United States. Son of Elias Hasket and Lucy (Brown) Derby.
Graduated from Harvard, 1824. Studied law in office of Daniel Webster.
Admitted to N.H. bar, 1827, N.H. Supreme Court bar, 1829. Specialized in railroad cases. Became director numerous railroads, influential in seeing completion Hoosac Tunnel.
Also wrote articles for various newspapers and mags. Performed 2 notable services in field of foreign affairs by helping prepare Preliminary Report on the Treaty of Reciprocity with Great Britain To Regulate the Trade between the United States and the Provinces of British North America, 1866, also in writing report which aided in drawing up fisheries treaty between United States and Great Britain, 1867.
Married Eloise Lloyd Strong, September 4, 1834, 7 children.