21 Feb 1752 - Birth of his biological mother Mary Warner at North Scituate, Gloucester County, Rhode Island, USA 

1753 - Birth of his biological father George Howland at Dartmouth, Bristol County, Massachusetts, USA 

1779 - Marriage of parents at Glocester, Providence County, Rhode Island, USA 

23 May 1784 - Birth at Concord, Lisbon County, New Hampshire, USA 

14 Nov 1797 - (13 years) Birth of his wife Dorcas Spooner at Lisbon, Grafton County, New Hampshire, USA 

01 Dec 1814 - (30 years) Marriage with Dorcas Spooner at Lisbon, Grafton County, New Hampshire, USA 

25 Dec 1816 - (32 years) Birth of his son Cyrus Howland at Concord, Lisbon County, New Hampshire, USA 

10 Sep 1835 - (51 years) Burial of his biological father George Howland at Sugar Hill, Grafton County, New Hampshire, USA 

10 Sep 1835 - (51 years) Death of his biological father George Howland at Lisbon, Grafton County, New Hampshire, USA 

29 Mar 1845 - (60 years) Burial of his biological mother Mary Warner at Lisbon, Grafton County, New Hampshire, USA 

29 Mar 1845 - (60 years) Death of his biological mother Mary Warner at Lisbon, Grafton County, New Hampshire, USA 

1850 - (65 years) Death of his wife Dorcas Spooner at Landaff, Grafton County, New Hampshire, USA 

1860 - (75 years) Death at Landaff, Grafton County, New Hampshire, USA 

23 Feb 1892 - Death of his son Cyrus Howland at Newbury, Orange County, Vermont, USA