23 May 1642 - Birth of his mother Ruth Wheeler at Concord, Middlesex County, Massachusetts, USA 

26 Jan 1645 - Birth of his father Samuel Hartwell at Concord, Middlesex County, Massachusetts, USA 

26 Oct 1665 - Marriage of parents at Concord, Middlesex County, Massachusetts, USA 

1686 - Birth at Concord, Middlesex County, Massachusetts, USA 

29 Nov 1690 - (4 years) Birth of his wife Hannah Blanchard at Woburn, Middlesex County, Massachusetts, USA 

19 Dec 1703 - (17 years) Death of his mother Ruth Wheeler at Concord, Middlesex County, Massachusetts, USA 

11 Jun 1713 - (27 years) Marriage with Hannah Blanchard at Concord, Middlesex County, Massachusetts, USA 

30 Jul 1715 - (29 years) Birth of his son James Hartwell at Concord, Middlesex County, Massachusetts, USA 

11 Sep 1717 - (31 years) Birth of his son Josiah Hartwell at Littleton, Middlesex County, Massachusetts, USA 

4 Dec 1719 - (33 years) Birth of his son Nathan Hartwell

24 Sep 1721 - (35 years) Birth of his son Simon Hartwell

12 Apr 1723 - (37 years) Birth of his daughter Hannah Hartwell

26 Jul 1725 - (39 years) Death of his father Samuel Hartwell at Concord, Middlesex County, Massachusetts, USA 

11 Jun 1734 - (48 years) Birth of his son Benjamin Hartwell

24 Oct 1739 - (53 years) Death of his son Benjamin Hartwell

1 Jan 1763 - (77 years) Death of his wife Hannah Blanchard at Littleton, Middlesex County, Massachusetts, USA 

8 Dec 1768 - (82 years) Death of his son Nathan Hartwell

9 Dec 1770 - (84 years) Death at Littleton, Middlesex County, Massachusetts, USA 

20 Jan 1791 - Death of his son Josiah Hartwell at Littleton, Middlesex County, Massachusetts, USA