Complex sentence: The memorial stone was a replacement for an inaccurate and damaged marker (McDowell's name was misspelled) and the original stone was subsequently donated by McDowell's family to the Delta Blues Museum in Clarksdale, Mississippi.
Split into simpler sentences: The memorial stone was a replacement for an inaccurate and damaged marker (McDowell's name was misspelled). The original stone was subsequently donated by McDowell's family to the Delta Blues Museum in Clarksdale, Mississippi.