One user comedically tweeted: “Who’d have thought ‘party like it’s 1613’ would be an aspirational phrase?”
Another wrote: “What a beautiful sketch, thank you for sharing. Clearly, as a young boy your father was a very competent rider.”
Mr Spencer inherited Althorp estate aged 27 as the eldest male in the Spencer family after the death of his father.
The ancestral home where Princess Diana and her brother grew up boasts 90 rooms and over 550 acres.
Following her death, Diana was buried on an island in the centre of the Round Oval Lake on the grounds of Althorp.
