Tulsa was a small town near the banks of the Arkansas River in 1901 when its first oil well, named Sue Bland No. 1,[21] was established. Much of the oil was discovered on land whose mineral rights were owned by members of the Osage Nation under a system of headrights. By 1905, the discovery of the large Glenn Pool (located approximately 15 miles south of downtown Tulsa and site of the present-day town of Glenpool) prompted a rush of entrepreneurs to the area's growing number of oil fields; Tulsa's population swelled to over 140,000 between 1901 and 1930.[22] By 1909, seven years after the discovery of oil in the area, Tulsa's population had sprouted to 180,000. Unlike the early settlers of Northeastern Oklahoma, who most frequently migrated from the South and Texas, many of thes