The Montserrat Co. Ltd. was formed in Edgbaston by J.& E. Sturge. Lime juice was produced in the city and then exported for use in the manufacture of citric acid. The failure of Sicily's lemon crop at that time resulted in an opening in the market which Sturge took great advantage of, utilizing their extensive chemical works based in Edgbaston. The company was set up by the Sturge and Albright families who funded the development of Montserrat estates in 1867. Joseph Sturge bought the Elberton Sugar Estate in 1857 and converted it into a lime production plant. He also wanted to prove that free labour could be made profitable. Members of the Sturge family were instrumental in the British anti-slavery movement. Brands Famous food brands that originated in Birmingham include Typhoo tea, Bird's Custard, Bournville cocoa, Cadbury chocolate, and HP Sauce. Restaurants The Old Crown public house, a black and white timber-framed building, is said to be the oldest secular building in Birmingham, dating back to 1450 to 1500. It is situated in Deritend and is documented as serving as an inn from 1626. Birmingham Corporation proposed its demolition in 1851, 1856 and 1862 but it was saved by the efforts of Joshua Toulman Smith. It is still used as a public house which serves food. The Saracen's Head in Kings Norton dates from the same period as The Old Crown and is now a visitor's centre with a snack bar. The work to restore The Saracen's Head came as a result of it being chosen for financial assistance by a vote of the viewers of the BBC television programme Restoration in 2004. The Leicester Arms, which became known as Freeth's Coffee House, situated at the corner of Bell Street and Lease Lane, served as a tavern and coffee house from 1736 to 1832. It served as a meeting place for small businessmen and lawyers and, when bought by John Freeth, a topical ballad writer, in the second half of the 18th century, it became a place for groups which supported radical politics, including the Birmingham Book Club, which held dinners at the coffee house. Freeth sent out rhyming invitations to dinner to club members. The club was recorded as having 24 members in 1775. Ann Allday, the wife of Joseph Allday who was a leading Birmingham Councillor from 1849 to 1859, ran a "celebrated" tripe restaurant and tripe shop