The diplomat of the time

It tells the adventures of a London diplomat named Anderson in the 18s, who has the ambition to kill Hitler before he commits all his atrocities, he does this because his father was killed during this war.

HE travels through eras and time aboard a temporal vessel having the outward appearance of a painting from The Portrait of Sarah Siddons, 1785, Thomas Gainsborough (London, National Gallery).

The problem is that he meets other people who have met evil Nazis who want to restore Hitler's dictatorship.