Both Joost and Margrietje lived to comparatively great ages, outliving three children and several grandchildren. They lived to see all twenty-five grandchildren, of whom four of the boys were named in honor of Joost, and five of the girls for their grandmother, Margrietje.
Joost was the first to pass away, at the age of 84, in the first week of June, 1760. On May 28, 1760, just days before his death, Joost, described as “ … weak of Body but of Sound mind and memory …” made his last Will and Testament. Executed at his plantation in “the Township of Reading in the County of Hunterdon”, Joost very carefully divided his vast land holdings among his surviving children and grandchildren.
Joost’s widow spent her remaining years on the homestead plantation which had been willed to her son, Hendrick. Margrietje lived to be 89, passing away on December 11, 1771. In the inventory of the “Goods and Chattles of Margaret Scamp Widdow late of Readington” there was included a “Feather Bed & bedding”, a warming pan, and a “large Arm Chair”.
Margrietje’s tombstone is in the old cemetery at Pleasant Run, Readington. Joost and Margrietje were buried in a family burial plot situated not far from their plantation. No stone survives to mark Joost’s grave, however, Margrietje’s tombstone still stands. Her initials “MS” are surmounted by the smaller letters “JS”, standing for those of her husband. The “D 11 +1771” indicates her death as December 11, 1771.