His father died in 1729 and, as the eldest son, Hadley inherited the estate near East Barnet as well as other land owned by the family.
Kanyang ama at namatay sa 1729, bilang pinakamatanda anak na lalaki, Hadley minana ang ari-arian na malapit sa East Barnet pati na rin ang iba pang mga lupa na pag-aari ng pamilya.