He was the illegitimate son of Thomas Barrett-Lennard, 17th Baron Dacre and Elizabeth FitzThomas.
[3] He entered the British House of Commons for Essex South in 1832 and was a Member of Parliament (MP) until 1835.
[4] Barrett-Lennard was a deputy lieutenant of Essex,[5] and a Fellow of the Society of Antiquaries of London.
Their fifth son, Edward Pomeroy Barrett-Lennard, emigrated to Australia where he established a large estate named after the one on which he had grown up.
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