The Great Portrait Mystery by R. Austin Freeman

As a collection of human oddments, the National Gallery on copying day surpasses even the Reading Room of the British Museum, and almost equals the House of Commons. The spectacle that it afforded was a source of perennial interest to Mr. Joseph Fittleworth, as were also the productions of the professional copyists, humorously described in official parlance as students. For Joseph Fittleworth was himself a painter, with a leaning to the methods of the past rather than to those of the future, a circumstance which accounted for his professional failure. Which illustrates the remarkable fact that in these days, when even indifferent Old Masters sell at famine prices, while the unsold work of contemporary genius grows mouldy in the studios, an artist's only chance of popularity is to diverge as far as possible from the methods of those great men of the past whose productions are in such demand.

Hence it had happened that Fittleworth had accepted with avidity a not very lucrative supernumerary post at the National Gallery where he could, at least, have his being amidst the objects of his worship, which we may remark included an exceedingly comely young lady, who came regularly to the gallery to copy pictures, principally of the Flemish school.