In 1767 as Robert Berry opened a shop close to Bootham Bar, York, selling cough lozenges, lemon and orange candied peel and other sweets. Joined by William Bayldon, the partners renamed the business Bayldon and Berry confectionery.

Born in Pocklington, Joseph Terry came to York to serve as an apprentice apothecary in Stonegate. On gaining his certificates, he set up as a chemist in Walmgate. But after marrying Harriet Atkinson in 1823, he met her elderly uncle Robert Berry. After William Bayldon left the business, Terry agreed to become a partner in the confectionery business, and after closing his chemists shop joined the confectionery business in St Helen’s Square, York.

Info gleaned from Wikipedia