His mother, Catherine Poulett, was a daughter of Sir George Dallas, 1st Baronet.
[1] He joined the 54th (West Norfolk) Regiment of Foot in 1840 and was educated at the Royal Military College, Sandhurst, passing out in 1842.
As Poulett's own father and older brothers had also died, this left him unexpectedly as the heir presumptive to the family estates, and he returned to England.
In Who's Who, Poulett gave his recreations as "Racing, hunting, steeple-chasing, shooting, driving, yachting, fishing, telegraphy, and photography".
In 1875, he was living at the family's secondary estate, Grenville Hall, Droxford, under the courtesy title of Viscount Hinton.
Lastly, in 1879, he married Rosa, daughter of Alfred Hugh (de) Melville, an artist.