William Phiston’s book “The Schoole of Good Manners” was published in 1609, in which he states:
"Some thrust so much into their mouthes at once, that their cheeks swell like bagpipes. Others open their Jawes so wide, that they smacke like Hogges: some blow at the nose. All which are beastly fashions. To drinke or speake when thy mouth is full, is not only slovenly, but dangerous."
Especially for the person opposite, I would add. It does show that, sometimes, it is only the spelling of the advice that changes in 400 years.
William was also keen that you didn’t have your elbows on the table:
"Take heede that thou trouble none of them (table guests) that sit next thee with thine Elbowes, nor those on the other side the table with thy feete."
Or just get a bigger table William. I wonder what table manners have changed over time? A new one this century for our family has been: Hey, no texting at the table!