In order to build brick houses lime was needed by the bricklayers and plasterers for making plaster and mortar. Contemporary records reveal that "lymeburners" emigrated to Jamestown as early as 1610. As four lime kilns were found during archeological excavations, it is evident that the lime used by the Jamestown builders was made on the historic island. In the kilns oyster shells from the James River were burned and converted into lime by the limeburners.