"Is he a member of one of the water-colour Societies?"

Landscape with a figure on horse
Public DomainLandscape with a figure on horse - Credit: Nicholas Pocock, a founder member of the Society
The Royal Watercolour Society is an English institution of painters.  It was founded as the Society of Painters in Water Colours in 1804 by William Frederick Wells, with ten members.  The members seceded from the Royal Academy, where they felt that their work commanded insufficient respect and attention.

In 1812, the Society reformed as the Society of Painters in Oil and Watercolours.  It reverted to its original name in 1820. The Society obtained its Royal Charter 1881. 

In 1988, it changed its name again to the Royal Watercolour Society.