It did strike me as familiar, this may be why.  It's not Julius Caesar,
after all.  It's Christopher Columbus, one of Twain's favorite
historical characters. He must be dead then.

On Tue, 2016-02-16 at 20:19 -0600, Barbara Schmidt wrote:
> A similar quote was attributed to Mark Twain by Vincent Starrett in
> his
> Foreword to THE ADVENTURES OF THOMAS JEFFERSON SNODGRASS (1928) which
> was a
> short collection of Mark Twain letters to the KEOKUK POST newspaper.
> Starrett wrote:
> 
> In some museum or other, in Havana, if memory serves, there are,
> according
> to the early Clemens himself, two skulls of Christopher Columbus --
> "one
> when he was a boy and one when he was a man." (p. x).
> 
> When Caroline Harnseberger published MARK TWAIN AT YOUR FINGERTIPS
> (1948)
> she revised the quote as:
> 
> In a museum in Havana there are two skulls of Christopher Columbus,
> "one
> when he was a boy and one when he was a man." -- P. x - THE
> ADVENTURES OF
> THOMAS JEFFERSON SNODGRASS (1928).
> 
> This quote falls into the "attributed" category without further
> verification.
> 
> Barb