Southall also painted in a variety of other laborious media ( such as the watercolour on vellum of his work Hortus Inclusus ) .
Lack of patronage limited his work in fresco - the medium he personally found most interesting .
Although Southall also painted in a variety of other laborious media ( such as the watercolour on vellum of his work Hortus Inclusus ) , lack of patronage limited his work in fresco - the medium he personally found most interesting .