William Walls R.S.A., R.S.W. (Scottish 1860 - 1942)
 
Sleeping Collie, Opsidale 
 
Watercolour on buff paper
 
Signed, Dated and Inscribed 'Opsidale, Sept 1909' lower right 
 
39.5 x 52cm
 
Provenence: The Tryon Gallery, London