While Phillis first appears in the same source of records at King’s Chapel as Richard, more details of her life have been uncovered through further research. Because Black women in colonial New England, especially those enslaved, tended to not know how to read or write, researchers are forced to depend on writings from white men of some social standing to learn more about enslaved people. Knowing that Phillis was an adult woman living in Boston in 1754 and was enslaved by a man named Jeffrey Bedgood, we can attempt to learn more about her life through looking at primary sources related to Bedgood. An excellent source of information that often results in information about enslaved individuals in Boston are will and probate records of known enslavers. A probate inventory is an evaluation of someone’s personal property and real estate holdings at the time of their death, and since enslaved individuals were legally considered property in 18th century Boston, the names of people enslaved at the time of the enslaver’s death often appear in these records. In the case of Phillis, she is also discussed in Bedgood’s will.
In his 1758 will, Bedgood set specific instructions in his will regarding Phillis's life after his death:
"I give unto my Negro Woman Fillis her Freedom, & do hereby immediately offer my decease, discharge, & sett her at Liberty, from all & every Person, & Persons whatsover - And I do hereby enjoin my Nephew Jeffrey Williams to procure & give such Security as by Law is require in the Manumission of Negroes before my Executor pays him."