[5] With Harriet being the favourite sister, the bulk of the Plymouth Estate was left to her, including Hewell Grange in Worcestershire and St Fagans Castle.

Baroness Windsor was due to perform the opening ceremony on 10 June 1865, but failed to turn up in time to meet the high tide.

[9] On her death, Baroness Windsor was praised her as "simple and unostentatious in her manner" and generous towards charitable causes, The Cardiff and Merthyr Guardian saying "In every movement which tended to the well-being of those around her, her large subscriptions expressed her sympathy with them".

[13] Shortly before her death she financed the building of St Philip's Church in Webheath, Redditch, including the three-lighted stained glass above the altar, however she died before its consecration in February 1870.

[14] With her husband Robert Clive (1789–1854), she had eight children:[2][15][16] Lady Windsor died in St Leonards-on-Sea, Sussex, on 9 November 1869, having been ill for a few months.

[13] With her eldest son having died earlier, her estate was passed to her infant grandson, Robert Windsor-Clive,[5] who became The Baron Windsor and later the 1st Earl of Plymouth when the title was revived in 1905.