Harrington, Cassady, and Clark are three separate historically African American cemeteries on 1.77 acres in Denton County. The land was originally owned by the Harrington family and is the site of Harrington Cemetery. Cassady and Clark Cemeteries were moved in 1953 to their present location adjoining Harrington Cemetery when the U.S. Army Corps of Engineers began construction of the Garza Little Elm Dam. The reinterred cemeteries have twelve-foot boundaries around their perimeters, and an entrance gate stands on Lloyd Road at the northeast corner. Lloyd, an early farming community, dates to 1850 and was named for A.P. Lloyd, Denton County's first county clerk. Most graves in Harrington are marked with headstones of marble, granite, sandstone, and concrete, while many graves in Cassady and Clark are marked by fieldstone and funeral home steel plates. Together the three burial grounds contain approximately 170 graves. The only African American owner of the Harrington land was E.L. Lugrand, and his brother's father-in-law, Nick Oldem, was the first documented burial in Harrington Cemetery in 1872. The original Cassady and Clark cemetery sites stood on land owned by African Americans. Jacob Cassady purchased the Cassady Cemetery land near Garza in 1872, and he and his wife, Melinda, are buried in this family cemetery. Zack Rawlings and George Clark purchased the Clark Cemetery land west of Garza in 1876, and its oldest legible marker is for Nancie Rolling, dated 1879. Present-day Lewisville Lake now covers the area where Cassady and Clark were first established, and after the burials were relocated, Meggs and Son Funeral Home deeded those two cemeteries to Denton County.