The way the score matches the picture also provides a masterclass in economy of use.
The building itself, which he rebuilt in two phases (1808-9 and 1812), provides a masterclass in the use of light and mirrors.
Bill Dudley, the president of the New York Federal Reserve and the second most important US central banker after Janet Yellen, has just provided a masterclass in central bank-speak.
Twitter was castigated mainly because it was Trump's favoured channel and his tweeting provided a masterclass in how to exploit it.
At the end of the fourth day's play here, when Alastair Cook had provided a masterclass in stoic resistance, when quick wickets could not be begged, borrowed or stolen, Dhoni remained unmoved.
The Wales manager looked on in admiration as the West Bromwich midfielder provided a masterclass in long-distance shooting with two wonderful goals to set up victory over Liechtenstein.
Janet Malcolm's Forty-One False Starts (Granta) provides a masterclass on the art of the essay from one of its most formidable living practitioners – often, as with the title essay, by sharing object lessons in failure.
Fara Williams, providing a masterclass in the holding role and ably assisted by Vicky Losada and Jordan Nobbs, barely gave the South Korean, scorer of the winner in last year's final, a moment of peace.
Mantel has always been obsessed by the capriciousness of fortune and in a novel full of bounds and tumbles, she provides a masterclass in the tragic arc of ascent and decline.
