Question: The Pee Dee River leads to a bay which leads to an ocean. Who led an attempt to link that ocean with the Pacific via a canal through the continental region containing the El Valle volcano?

Passages:
Winyah Bay is a coastal estuary that is the confluence of the Waccamaw River, the Pee Dee River, the Black River, and the Sampit River in Georgetown County, in eastern South Carolina. Its name comes from the Winyaw, who used to inhabit the region during the eighteenth century. The historic port city of Georgetown is located on the bay, and the bay generally serves as the terminating point for the Grand Strand. Hobcaw Barony is a tract on a peninsula called Waccamaw Neck between the Winyah Bay and the Atlantic Ocean in Georgetown County, South Carolina. Much of Hobcaw Barony is south of US Highway 17. The land was purchased by the investor, philanthropist, presidential advisor, and South Carolina native Bernard M. Baruch between 1905 and 1907 for a winter hunting retreat. Later, his eldest child, Belle W. Baruch, began purchasing the property from her father beginning in 1936. By 1956, Belle owned Hobcaw Barony entirely. Upon her death in 1964, the property was transferred to the Belle W. Baruch Foundation for a nature and research preserve. The property includes more than 37 historic buildings and structures representative of the eras of both 18th & 19th century rice cultivation and 20th century winter retreats. Hobcaw Barony was named to the National Register of Historic Places on November 2, 1994. El Valle is a stratovolcano in central Panama and is the easternmost volcano along the Central American Volcanic Arc which has been formed by the subduction of the Nazca Plate below Central America. Some time prior to 200,000 years ago, the volcano underwent a huge eruption event that caused the top of the volcano to collapse into the empty magma chamber below forming a large caldera. Several lava domes have developed inside the caldera since the collapse—forming Cerro Pajita, Cerro Gaital and Cerro Caracoral peaks. Prior to research in the early 1990s, it was thought that no active volcanism existed within Panama. But radioactive dates from El Valle show that the volcano last erupted as recently as 200,000 years ago. By the late nineteenth century, technological advances and commercial pressure allowed construction to begin in earnest. Noted canal engineer Ferdinand de Lesseps led an initial attempt by France to build a sea - level canal. Beset by cost overruns due to the severe underestimation of the difficulties in excavating the rugged Panama land, heavy personnel losses in Panama due to tropical diseases, and political corruption in France surrounding the financing of the massive project, the project succeeded in only partially completing the canal.

Supporting sentences:
Winyah Bay is a coastal estuary that is the confluence of the Waccamaw River, the Pee Dee River, the Black River, and the Sampit River in Georgetown County, in eastern South Carolina. Hobcaw Barony is a tract on a peninsula called Waccamaw Neck between the Winyah Bay and the Atlantic Ocean in Georgetown County, South Carolina. El Valle is a stratovolcano in central Panama and is the easternmost volcano along the Central American Volcanic Arc which has been formed by the subduction of the Nazca Plate below Central America. Noted canal engineer Ferdinand de Lesseps led an initial attempt by France to build a sea - level canal.