"Sarah died in 1834."
[Note: not sure of the credibility of this source as they misidentify Robert and Sarah's son Joseph, however, on 16 Aug 1831, a share of her brother's estate is assigned to her with no indication that she had died, while on 18 Aug 1835 and 16 Feb 1841 her share in further distributions are to go to her exec'r or admin. This is not conclusive, but entirely in agreement with this source, versus the unsupported death date given on the Find A Page memorial which would imply all three distributions should have indicated that she was deceased.]