Harriett Lethbridge was born in 1796. Her parents were Christopher Lethbridge & Mary (Copeland) Lethbridge.
Harriett Lethbridge married Philip Parker King in 1817.
Harriett (Lethbridge) King died on 19 December 1874 at Ashfield, New South Wales, Australia. 
"Family Notices" Evening News (Sydney, NSW : 1869 - 1931) 21 December 1874
On December 19, at Moomblee, Ashfield, Harriet, relict of the late Rear-Admiral Philip P. King, R.N., aged 78 years.
↑NSW BDM Index 2278/1874 KING HARRIETT (parents) CHRISTOPHER & MARY (CONCORD)
It may be possible to confirm family relationships with Harriet by comparing test results with other carriers of her mitochondrial DNA.
However, there are no known mtDNA test-takers in her direct maternal line.
It is likely that these autosomal DNA test-takers will share DNA with Harriet: