Modern-day longtime residents of the Okefenokee Swamp, referred to as "Swampers", are of overwhelmingly English ancestry. Due to relative isolation, the inhabitants of the Okefenokee used Elizabethan phrases and syntax, preserved since the early colonial period when such speech was common in England, well into the 20th century. The Suwannee Canal was dug across the swamp in the late 19th century in a failed attempt to drain the Okefenokee. After the Suwannee Canal Company's bankruptcy, most of the swamp was purchased by the Hebard family of Philadelphia, who conducted extensive cypress logging operations from 1909 to 1927. Several other logging companies ran railroad lines into the swamp until 1942; some remnants remain visible crossing swamp waterways. On the west side of the swamp, at Billy's Island, logging equipment and other artifacts remain of a 1920s logging town of 600 residents. Most of the Okefenokee Swamp is included in the Okefenokee National Wildlife Refuge.