Wiltshire was a county in England. The manufacturer Stephen Pettifer & Sons had its main business office in this county, out of the city of Malmesbury. A sign for this manufacturer was recreated for the holoprogram simulation of 1890s London.
In 2365, when Data (as Sherlock Holmes), Geordi La Forge (as John H. Watson), and Katherine Pulaski were walking along a London street, they passed this sign, which mentioned this county's name. (TNG: "Elementary, Dear Data")