Until 1840 , the series always made it fairly clear that Angelique 's timline followed Barnabas's . She arrives in 1968, follows Barnabs back to 1796,is burned by Ben and sent back to Hell for 101 years , then is resurrected in 1897 by Quentin and Evan. In 1796 and 1897 , Angelique confirms to Barnabas that she had experienced every previous meeting that he's had with her . Then Angelique is seen next as Sky Rumson's wife in 1970. I always though she had lived thru all the years from 1897 , although that's unclear.
1840 is where everything gets confusing . Angelique has been traveling with Lazlo and visits Barnabas 's tomb every year . She doesn't know Julia and seems to truly be the Angelique from this era . Presumably she was resurrected after Barnabas was entombed .Then at the end of 1840 she removes her curse , loses her powers and dies . This would seem to contradict what we've seen from her before . How could this Angelique go on to be the Angelique we've already seen in 1968? Well, when Barnabas, Julia and Stokes returnto the present , they have changed time , and Elizabeth doesn't even know they were gone . So that could be the answer . That because of time travel , time has been changed , and Angelique from 1840 died a mortal death and did not go on to be reborn in the modern day , just as Quentin's fate was changed and he was not a ghost haunting 20th century Collinwood. For that matter , Brnabas traveled back in time using I-Ching , but came forward thru the time staircase ! So his coffin post 1840 would be empty !
Minor spoiler for Big Finish's audio series and Return to Collinwood ( both of which I highly recommend ) [spoiler]Angelique is resurrected in both of those , and seems to have memories of both 1840 and the other time periods we've seen her live thru .
I just chalk that up to her having memories from both versions of history , having been dead so many times and all . Barnabas had memories of both Phyllis Wick and Victoria being Sarah's governess post 1795, he confirms this with Julia shortly after Vicky's return .[/spoiler]
And shouldn't Angelique Rumson still have been alive , as we saw her last shortly before PT1970 ?
DS was pretty sloppy in cleaning up their paradoxes , after all everyone still remembered Quentin as a ghost once Quentin returned to Collinwood post 1897!
But in my way of thinking , 1840 Angelique was native to that time period , and her timeline is a jumbeled mess that can't be neatly aligned into a single straight line.