Throughout the evening, he alluded to various kinds of "unpublished work."
She carried out much unpublished work on the subject.
My publisher wanted to go to press immediately with a collection of my unpublished work.
This contains previously unpublished work by Gibbs, from the period between 1863 and 1871.
He was also a fine writer of self-published and unpublished work.
"It's totally usual for unpublished work, in the long run, to be published," he said.
"It's an unpublished work and as a result is entitled to a great deal of copyright protection."
Here is a selection of this unpublished work, followed by excerpts from our conversation.
He died in 1997, aged 84, leaving behind a large body of published and unpublished work.
There is a regular webzine of new and unpublished work.