Doing the MathWe'll allow WATO to generate a complement of suggested hypotheses for our Pearson family diagram. The WATO tool uses the probabilities implied by each hypothesis' relationship to the individuals sharing linkage in the Pearson family group to generate genetically — if not genealogically — compatible hypotheses — and then scores these probabilities. (click to enlarge)
However, because we know JSM was born in 1948, her mother in 1922, and her maternal grandfather in 1889, we can immediately remove any hypothesis which violates genealogical plausibility, as shown in the following table:
- The resulting calculations show that it's more than 178 times likely that JSM's grandfather is a full sibling to Edward, Lucy, and Arthur Pearson than the heretofore unacknowledged offspring of William Pearson and an unknown woman. William and Sarah Pearson had 6 male children:
- William Pearson (1888–1963)
- Uriah Pearson (1889– )
- Edward Pearson (1897–1959)
- John Pearson (1905– )
- Joseph Pearson (1907– )
- Arthur Ernest Pearson (1912–1973)
As it happens, William Pearson was already married with children when JSM's mother was born, and likewise appears in the 1939 register living with his family. However, although Uriah married in July, 1911 (and a child may have been born of the union in 1914), there appear to be no records of Uriah after his discharge from the British Army in August of 1917 — approximately one year before the earliest citations of JSM's grandfather Albert James Harris appear, as witness to a wedding. Further, particulars concerning military enlistment and discharge, written on the back of an envelope addressed to JSM's grandfather, appear to reference the same Regimental Number as is shown on Uriah Pearson's British Army World War I Medal Rolls Index Card from 1917 (blue arrow).
Whatever the circumstances, it would appear that following his discharge from the British Army, Uriah Pearson embarked on a new life as Albert James Harris, taking a new wife and adopting this new identity for the remainder of his days.