Keiller's marmalade
The bargain gave his mother, Janet, the opportunity to manufacture a large quantity of marmalade by boiling the bitter oranges with sugar.Janet Keiller's main modification to the recipe in 1797 may have been the addition of thin strips of orange rind, creating peel or "chip" marmalade.[6] In 1859 the company set up a factory in Guernsey in order to avoid the sugar tax charged on the mainland and with a view to eventually expanding business in the south of England.[8] In 1876, when the British Trademark Registry Act came into force, Keiller's Dundee Orange Marmalade was one of the first brands to be formally registered.Work had been suspended at the factory for some time, and it was stated that Messrs Keiller had spent £132,000 on the plant, which could deal with about 3,000 tons of fruit in a season.