I did not insist. I only know that most Americans, consider "vanners', Gypsies. Only trying to educate.
The word we still use today to describe deliver vehicles, - ie. vans, comes from the original old word 'vanner'. Our current UPS delivery man, would have been known as a vanner in the old days, in the UK. And his horse, known also, as a vanner.
Generations ago, Gypsy Horse/Cob breeders, often sold their 'half-leggers' to delivery companies. These were horses whom they deemed as less than ideal and not of breeding quality. Not that some good ones didn't end up as vanners, working in the streets of England's big cities. Remember, horses were often the Gypsies only means of currency.
You can see some vanners and their horses, here.. AntiquePhotos
I am old enough to remember when almost all our milk, bread and groceries, were delivered by vanners, in England.