1691 New York Governor Henry Sloughter

I am descended from 1691 New York and Massachusetts Governor Henry Sloughter. I know he died in 1691, which is the same year he was appointed Governor by King William and Queen Mary. Henry Sloughter was buried at St Mark's Church. However, I do not know where his obituary was published or where his will was filed. I would appreciate some assistance if you know how to find these records or would like to share facts about my ancestor Henry Sloughter.