Jerry, there's this lovely Christmas wish:
    "It is my heart-warm and world-embracing Christmas hope and
aspiration
that all of us, the high, the low, the rich, the poor, the admired, the
despised,
the loved, the hated, the civilized, the savage (every man and brother
of us all through-out the whole earth), may eventually be gathered
together
in a heaven of everlasting rest and peace and bliss, except
the inventor of the telephone."
Don't know the source; Caroline Harnsberger's Everyone's Mark Twain:
says it's from a "manuscript, circa 1878)."
Someone else may know more.