Census Bureau
"is a principal agency of the U.S. Federal Statistical System, responsible for producing data about the American people and economy."
definition found from : https://www.google.com/webhp?sourceid=chrome-instant&ion=1&espv=2&ie=UTF-8#q=define%20census%20bureau
This implies that these were shops which primarily sold candles, but also sold various products like a convenience store.

