Duncan's Timeline: 1880-1905

1880
Visits China at the behest of Kiem Sun (A3, 'The Road Not Taken'). Sun claims to have perfected his drug, but the subsequent demonstration ends in death to both mortal guinea pigs along with MacLeod's warning that Sun should prepare himself for The Gathering. This is his only recorded visit away from American soil in over 50 years from 1854 to 1914.

1882
Returns to the Pacific North West where he establishes himself as a newspaper proprietor. He attempts (unsuccessfully) to save a young man from Immortal bounty hunter Mako (B12, 'Under Color of Authority'). Later, his attempts to marry Sarah are first thwarted by the fact that she's already married, and then by her rejection of him when he's shot by her husband and revives after coming for him in a jealous rage (C8, 'Obsession').

1883
Duncan and fellow Immortal Gregor Townsend help out during a Cholera epidemic - Gregor is shot by a distraught father after failing to save his child (B2, 'Studies in Light').

1886
Relocates to San Francisco where he meets up with old friend Alec Hill. Unfortunately, Alec's mortal wife Genevieve has a past, and it catches up with her in the form of Immortal Gerard Kragan, who kills her in front of Alec and Mac (E7, 'Haunted').

1888
Duncan is forced to leave his saloon home in San Francisco when its owner Kit O'Brady loses it to Amanda in a poker game (D5, 'Double Eagle'). Afterwards, he visits Alec Hill again, only to find the Immortal still brooding over his wife's death (E7, 'Haunted').

1891
Tries his hand at bare-knuckle boxing under the watchful eye of Immortal Tommy Sullivan, newly arrived in San Francisco  from the Emerald Isle (B11, 'The Fighter').

1896
While in Boston, Duncan is set up by a helpless female Immortal, Sharon, for Axel, an evil Immortal who uses her as bait. Duncan persuades her to escape, but Axel kills her when she tries to leave him (C5, 'Rite of Passage').