Though he used very little liquor of any kind, it was Mark Twain's
custom to keep a bottle of Scotch whiskey with his collection of
pipes and cigars and tobacco on a little table by his bed-side.
During restless nights he found a small quantity of it conducive to
sleep. Andrew Carnegie, learning of this custom, made it his
business to supply Scotch of his own special importation. The first
case came, direct from Scotland. When it arrived Clemens sent this
characteristic acknowledgment.
*****
To Andrew Carnegie, in Scotland: