Question: What is the date of death of William Pole-Tylney-Long-Wellesley, 5Th Earl Of Mornington's mother?
Sentence (from "William Pole-Tylney-Long-Wellesley, 5th Earl of Mornington"): Bitter, protracted custody litigation followed — his mother's sisters with temporary custody succeeded in placing him under the guardianship of the Duke of Wellington, his great- uncle.
Relevant evidence: No