Following the stream, and crossing several picturesque wooden covered bridges, through EMBREEVILLE, a half mile east of which is Point Lookout, where sentries were posted to guard supplies for American Encampment at Valley Forge; marked by Chester County Chapter of the Daughters of the American Revolution; opposite is “Star Gazers’ Stone,” set by Mason and Dixon, 1764, in running a base line for boundary between Pennsylvania and Maryland; here they made various astronomical observations; calculated the force of gravity; and measured a degree of latitude on the earth’s surface southward; this stone was walled and marked, with bronze tablet. Several places in the vicinity, connected with the Lenni-Lenape Indians, are also marked; in County Home, grounds, grave of Indian Hannah, last of her race in this county; site of her cabin half mile south of NORTHBROOK; Indian cemetery half mile west of Northbrook; and Indian Rock, just west of Northbrook; from the latter point the Indian chief, Checochinican, claimed that land had been reconveyed to the tribe up to source of stream, a mile on either side; these negotiations, in the picturesque language used by the chief, are among the records of the provincial assembly; Okehocking, Indian Town, has been marked by tablet. Just east of Northbrook, birthplace of Humphry Marshall, botanist; two miles north, at MARSHALLTON, adjoining his old home, is interesting arboretum, still containing many trees planted by him; marked with bronze tablet. Continue drive to LENAPE, amusement park, where East Branch of the Brandywine, from Downingtown, unites with western; down main stream, skirting, just above Pocopson, a beautiful spot, Dungeon Bottom; and passing several antique, covered, wooden bridges, to CHADDS FORD; here the ranks of British, Hessians, and Continentals charged to and fro at Battle of Brandywine, September 11, 1777; two miles northeast, old BIRMINGHAM meeting house, used as hospital by troops, and center of some of the fiercest fighting; many points connected with the battle were marked with tablets by Chester County Historical Society, in connection with State Historical Commission, in 1915. On State Highway, six miles west of Chadds Ford, Kennett Square, birthplace of Bayard Taylor, poet and traveler, and his later home “Cedar-Croft,” built by him, one mile south, both marked with bronze tablets; he was buried at Longwood Meeting House, about two miles east; artistic monument, a cylindrical stone; at this meeting house, of “Progressive Friends,” many prominent leaders of anti-slavery spoke before the Civil War. This region was center of anti-slavery sentiment, many of the old Quaker homesteads were stations of the so-called “underground railroad,” by which fugitive slaves were protected and carried [Illustration: BAYARD TAYLOR MONUMENT, LONGWOOD]