Hello,
Who were the witnesses to the marriage?
Do you have Percy in 1871 or 1881?
I have just followed this person, Walter Last , through censuses. He was born abt 1857, Barham, Suffolk and it is interesting. He goes from being a Page in Suffolk, to a footman in Portland Place, London and then a Butler in Eaton Place in 1891. By 1901 he has left service and married.
I wonder if Percy was in Eaton Place briefly between posts. He may have been travelling with his employer in 1881. I would imagine his experiences would be similar to Walter Last's.
Heywood