The London Review of Books has a review by Fara Dabhoiwala of a book by Simon Newman called Freedom Seekers: Escaping from Slavery in Restoration London which heavily features Samuel Pepys.
(UPDATE: You can download the book for free from the University of London Press)
The article begins:
On Valentine’s Day 1661 Elizabeth Pepys and her husband, Sam, rose early and walked from their house behind the Tower of London down Seething Lane. They were to visit one of Sam’s superiors, William Batten, surveyor of the navy. The custom was that women should take the first man they saw as their Valentine, so long as he was no relation. The previous year, Elizabeth had selected her own beau; this time it was all planned to further Sam’s new career as clerk of the acts to the Navy Board. Elizabeth was to be paired up with the elderly Batten; Sam was assigned to Batten’s daughter Martha. He knocked at the front door, ‘but would not go in till I had asked whether they that opened it was a man or a woman’. From behind the door, ‘Mingo, who was there, answered “a Woman”, which, with his tone, made me laugh.’ Pepys didn’t bother in his diary to explain who Mingo was but evidently they knew each other.
This also makes me wonder whether we should more accurately refer to Mingo and Jack as slaves, rather than servants?