Before the 19th century, the main businesses of Slough were brickfields and agriculture. The bricks for the building of Eton College were made in Slough. Later, as the Great West Road traffic increased, inns and pubs sprang up along the road to service the passing trade. Until the town developed as an industrial area, nurseries were prominent in the local economy; the Cox's Orange Pippin apple was first raised in Colnbrook (not then within Slough) around 1825, and the dianthus "Mrs Sinkins Pink" was first raised at some point between 1868 and 1883 by John Sinkins, the master of the Eton Union Workhouse, which lay in Slough.