Sense Sonnet - Tickler

Twain Typo?

Mark Twain wrote in nineteen oh four
In his autobiography
That what thing had hurt his morals more?
A damn typewriter - that would be.
That machine made him want to swear,
As he typed "Tom Sawyer" on it.
In this assertion  - did Twain err?
Facts say "Tom Sawyer" was handwrit.
Now later manuscripts did go
To his publisher typed out nice,
And first typewritten book we know
Was from Mark Twain - that should suffice.

But his own typing did Twain do?
Or hand to a hired typist to?