In 1781 Barret exhibited a painting at the Royal Academy of a View of Windermere Lake in Westmoreland, the effect, the sun beginning to appear in the morning, with the mists breaking and dispersing.
This may be the same painting as the painting which is signed in brown paint G. Barret / 1781 that is now in the National Gallery of Victoria, Australia Barret appears to visited the Lake District in 1781, and not only produced other versions of this painting, which shows Belle Island, but also other views of Windermere and Ullswater, both as paintings and gouache.
The Belle Isle view was also published as an engraving.

During the 1770s the scenery of Lake District became a popular attraction for tourists, aesthetes and painters and particularly after Thomas West's Guide to the Lakes of 1778, which commended the noble scenes of Poussin exhibited on Windermere-Water.
Lake Windermere, with Belle Isle, its largest island, was one of the principal attractions.
  Barret would appear to be selling these views to tourists who had visited the Lakes.
 The island in Lake Windermere, formerly Longholme, was bought by Thomas English in 1772.
The architect John Plaw built a three-story rotunda house (just discernable in the painting) with a massive classical portico.
 In 1781 he sold the site to Isabella Curwen, whose husband, John Christian Curwen, renamed the island Belle Isle.
In 1781 Barret exhibited a painting at the Royal Academy of a View of Windermere Lake in Westmoreland, the effect, the sun beginning to appear in the morning, with the mists breaking and dispersing. This may be the same painting as the painting which is signed in brown paint G. Barret / 1781 that is now in the National Gallery of Victoria, Australia Barret appears to visited the Lake District in 1781, and not only produced other versions of this painting, which shows Belle Island, but also other views of Windermere and Ullswater, both as paintings and gouache. The Belle Isle view was also published as an engraving. 
During the 1770s the scenery of Lake District became a popular attraction for tourists, aesthetes and painters and particularly after Thomas West's Guide to the Lakes of 1778, which commended the noble scenes of Poussin exhibited on Windermere-Water. Lake Windermere, with Belle Isle, its largest island, was one of the principal attractions.   Barret would appear to be selling these views to tourists who had visited the Lakes.  The island in Lake Windermere, formerly Longholme, was bought by Thomas English in 1772. The architect John Plaw built a three-story rotunda house (just discernable in the painting) with a massive classical portico.  In 1781 he sold the site to Isabella Curwen, whose husband, John Christian Curwen, renamed the island Belle Isle.
George Barret Sr.