 The graves they denote are below the bottom of the lake.The earliest gravestones are dated 1875, a testament to the community’s early establishment.Sardis was located in the picturesque Jack’s Fork Creek "valley", just above its junction with the Kiamichi River valley, framed by the slopes of Flagpole Mountain (1,562 ft.) on the south and the Potato Hills—a geographic curiosity due to their highly irregular shapes—on the north.