[4] Three years after her brother, Major Robert Poore, married Flora Douglas-Hamilton, on 4 December 1901 Nina married Flora's brother Alfred Douglas-Hamilton, 13th Duke of Hamilton, at the parish church of Newton Tony, Wiltshire, not far from her parents' home at Winterslow.

[3] Together, they were the parents of four sons and three daughters: Douglas-Hamilton was very proud of her father's work in helping agricultural labourers at Winterslow and was philanthropic towards the group, but kept her gifts secret from all but the recipients.

[4] At the beginning of the Second World War she opposed pet-culling that was being encouraged by civil defence authorities, that led to what became known as the "British pet massacre" in 1939 and 1940, and caused her to shelter many cats at Ferne.

[9] Douglas-Hamilton was chief promoter of the Animal Defence Society's "Model Humane Abattoir", established in Letchworth in 1928.

[10] On creation of the humane abattoir, Douglas-Hamilton commented that "in a civilized country, a slaughterhouse need not be a place of horror, into which animals are driven by kicks and tail-twistings.

[4] A Princess Coronation Class steam locomotive was named after her, which is on static display at the National Railway Museum, York.