Complex sentence: In 1807, at the age of 21, Haydon exhibited, for the first time, at the Royal Academy, "The Repose in Egypt," which was bought by Thomas Hope a year later for the Egyptian Room at his townhouse in Duchess Street.
Split into simpler sentences: In 1807, at the age of 21, Haydon exhibited, for the first time, at the Royal Academy. The painting he entered, "The Repose in Egypt," was bought by Thomas Hope a year later for the Egyptian Room at his townhouse in Duchess Street.