Winter brings its own enchantments - the chance to study the garden's intricate topography, with its archipelago of tiny islands and connecting bridges. Now the profuse growth of summer has died back and only the shrubs stand above ground, the sheer expanse of the lake is revealed, reflecting the bare trees in its dark waters. A winter view of the thatched summerhouse, built for the original 1920s garden.   Water hawthorn, a member of the lily family, flowers even in the winter.