lost. Last month it was a 12:30 a.m. email to Benjamin J. Rhodes, the deputy national security adviser, and Denis R. McDonough, the White House chief of staff, telling them he had finished reworking a speechwriter’s draft of presidential remarks for later that morning. Mr. Obama had spent three hours scrawling in longhand on a yellow legal pad an angry condemnation of Donald J. Trump’s response to the attack in Orlando, Fla., and told his aides they could pick up his rewrite at the White House usher’s office when they came in for work. Mr. Obama calls himself a “night guy,” and as president, he has come to consider the long, solitary hours after dark as essential as his time in the Oval Office.

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He works on speeches. HeHistorians recognize Bartolommeo Cristofori as having invented the piano during the early 1700's. However, use of a finger keyboard which functions to create sounds, dates back to approximately the year 1350 when such a keyboard was added to an instrument called the psaltery. The instrument resulting from the addition of the keyboard to the psaltery became known as the harpsichord. The keyboard used throughout history has remained virtually unchanged to modern times. Today, modern pianos, harpsichords, and even technology's most cutting edge electronic instruments employ virtually the same keyboard that was developed in the 1300's.
The playing of music on a keyboard instrument by a subject human being requires the subject to perform numerous simultaneous motor-skills and thought processes, not the least of which is the proper striking of