Gentleman's Magazine, vol. 80 pt 1 (1810), p. 597 — obituary of John Metcalf · The Gentleman's Magazine, June 1810
For “Descendants at death” 1810 of John Metcalf
"His descendants are four children, twenty grandchildren, and ninety great and great-great-grandchildren." Baring-Gould gives the same figures; Andrews and DNB: "ninety great-grandchildren".