This is one of three drawings of the ‘Portsmouth’ in the NMM collection, the others being PAH9363 and PAF6568. This one shows her from slightly before the port beam with eight round wreathed ports on the broadside. There is a double light between the second and third ports from the stern; the two foremost ports are raised above the others and there are guns in the three ports in the waist. The figurehead is perhaps mermaids riding on a lion.

The drawing is inscribed ‘poosmout’, and is signed in Indian ink ‘W.V.V.J.’

This yacht should not to be confused with a 48-gun fourth-rate called ‘Portsmouth’, in service at the same period but destroyed in 1689, of which there are also drawings.