Biographical informationDavid Simpson was born in Scotland (date ?). He migrated to Western Australia in 1865 per Warrior.
He partnered with Archibald Morton to form Simpson & Morton in 1881. He and Malcolm McIntosh had been the lease holders of Mardie Station since about 1867. Simpson & Morton eventually bought Mardie Station outright in 1881. They also leased Towera and Kooline Stations. Simpson died on Kooline Station in 1886.Date of death26th August 1886