An oil sketch of the façade of Greenwich Hospital seen from the Isle of Dogs on the north side of the Thames. The Union flag is shown flying over the Governor's residence at the river end of the King Charles Court on the right. In the foreground boats have been sketched in on the river with small river craft on the right and a merchant vessel, possibly a brig, on the left. Despite the unfinished feeling of the painting, the artist has suggested an air of calm and stillness through the inclusion of reflections of the buildings on the water.

John Ruskin observed that Roberts's prime concern in his oil and watercolour paintings was the depiction not of fleeting atmospheric effects but of the 'constant aspect of any place'. Here he has concentrated on the architectural features of the Hospital and the strong vertical lines enforce and emphasize the sense of permanence of place.

Born in Edinburgh, Roberts was apprenticed to a house-painter and then became a theatrical scene-painter, working in collaboration and rivalry with Clarkson Stanfield in London in the 1820s. He developed an interest in exotic places, especially in Egypt and the lands of the Bible, and visited Jerusalem in 1839. His experience as a scene-painter helped him to convey the vistas of towns, deserts and mountains, as well as more detailed interiors of buildings and scenes of local life. Roberts's eastern compositions reached a wide audience through 247 lithographs made by Louis Haghe, later bound into six volumes 1842-49. He also created associated oil paintings, achieving his effects through an ingenious choice of viewpoint which sometimes disregarded topographical accuracy, a balance of light and dark, and the use of strong and vibrant colour. He was elected ARA in 1838 and RA in 1841. Although the East was Roberts's greatest source of inspiration, he also made frequent trips to the Continent from 1824 where his early work in Spain was particularly notable. In the 1860s he began a series of views of the Thames on which he was still engaged at his death. This painting belongs to that period but, unlike other examples, no larger finished version is known.