What would it be like, to have built that ? Daniel could only guess at it, by considering what he had built, and trying to appraise it in a similar spirit. But Daniel’s work was not finished yet. He was not that old—or so he felt, in present company. When Wren’s son had laid the last stone into its place in the lantern atop the dome of St. Paul’s, Sir Christopher had been ten years older than Daniel was today .