Conversation so far:
Who did Hugh Trevor-Roper marry?
Trevor-Roper married Lady Alexandra Henrietta Louisa Howard-Johnston.
Did Hugh Trevor-Roper have children?
There were no children by Hugh Trevor-Roper's marriage.
What was Hugh Trevor-Roper title?
Hugh Redwald Trevor-Roper's title was Baron Dacre of Glanton.
In latter years,how was Hugh Trevor-Roper's health?
In his last years Hugh Trevor-Roper had suffered from failing eyesight, which made it difficult for him to read and write.

Question: What work did he submit in his latter years?
Self-contained rewrite: What work did Hugh Trevor-Roper submit in his latter years?