In the 1841 parallel time continuity, Barnabas Collins never became a vampire, and enjoyed a happy life with Josette – a life he never came to know in the mainstream continuity. Although Barnabas was wealthy when he married Josette, his fortune dwindled and he died almost penniless.
Barnabas and Josette had another son who supposedly died in Peru. In 1970 parallel time, Barnabas of the other time-line claimed to be his descendant.
Barnabas Collins had died by the time of the 1841 parallel time reality, and has never made an appearance in the original Dark Shadows television series.