1906, from Dublin, New Hampshire:

"The title of the piece is 1601. The piece is a supposititious
conversation which takes place in Queen Elizabeth's closet in that year,
between the Queen, Ben Jonson, Beaumont, Sir Walter Raleigh, the Duchess
of Bilgewater, and one or two others, and is not, as John Hay mistakenly
supposes, a serious effort to bring back our literature and philosophy to
the sober and chaste Elizabeth's time; if there is a decent word findable
in it, it is because I overlooked it. I hasten to assure you that it is
not printed in my published writings."


TWITTING THE REV. JOSEPH TWICHELL

The circumstances of how 1601 came to be written have since been
officially revealed by Albert Bigelow Paine in 'Mark Twain,
A Bibliography' (1912), and in the publication of Mark Twain's Notebook
(1935).

1601 was written during the summer of 1876 when the Clemens family had
retreated to Quarry Farm in Elmira County, New York. Here Mrs. Clemens
enjoyed relief from social obligations, the children romped over the
countryside, and Mark retired to his octagonal study, which, perched high
on the hill, looked out upon the valley below. It was in the famous
summer of 1876, too, that Mark was putting the finishing touches to Tom
Sawyer. Before the close of the same year he had already begun work on
'The Adventures of Huckleberry Finn', published in 1885. It is
interesting to note the use of the title, the "Duke of Bilgewater," in
Huck Finn when the "Duchess of Bilgewater" had already made her
appearance in 1601. Sandwiched between his two great masterpieces, Tom