| 1720 | . | Great grandfather born |
| 1770 | . | Grandfather Philo born |
| 1792 | . | Father Jedediah born, May 25th, New Haven, Vermont. Son of Philo Dorwin and Mary Hubbell. |
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George Born. Exact birth date unknown. |
| 1841 | 22 | George was present in Rawdon "...at the burial of John McRea of Rawdon, labourer, who was drowned in the Lacquourreau [sic] River on May 27, 1841 and buried on the 28th. Witnesses to burial were John Robinson, George Dorwin and Charles Dunn." |
| 1851 | 32 | George and his father Jedediah living in Rawdon according to 1851 Rawdon Census |
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52 | George listed in Lovell's Directory for the Province of Quebec as the secretary treasurer for the Municipal Council and the School Commission of Rawdon |
| 1883 | 64 | Nov. 15. 2:30 pm. George unable to attend his father's funeral at Montreal's Christ Church Cathedral, due to illness. |
| 1884 | 65 | Feb. 18. George dies of asthmatic consumption: recorded in First
French Methodist Church.
Feb. 20. Buried from his late residence, No. 218 St Lawrence Street, Village of St Jean Baptiste. Witnesses were Mitchell Sadler, Y L Grant and another indecipherable signature. |
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| 1904 | 78 | 28 October. Sister Esther M. Dorwin Manson dies. Buried on Mount Royal. |
| 1911 | 81 | 6 February. George's wife, Celia McManus, dies. |