[1] In 1826, Larkin began his business career by establishing a country store in Upper Chichester Township.

[4] In 1848, Larkin built two vessels and established a daily shipping line delivering goods between Chester and Philadelphia.

Larkin built over 500 buildings including mills, stores and dwellings in this section of Chester which became known as "Larkintown".

[7] In 1879, Larkin donated two acres of land adjacent to the St. Martin's Church in Marcus Hook, Pennsylvania for use as a cemetery.

Together they had eight children including a daughter Caroline who married U.S. Representative John Martin Broomall.