Anyway, Angelique is hardly an amnesiac in 1840.  She just happens to be a native of 1840, who has no foreknowledge of anything that happens after 1840.
I was very amused to see that the bill Dr. Hoffman found in Harrison Monroe's papers for the painting actually listed the work's title as "Q View of South Wales"! Evidently, somebody on the production team had quite the sense of humor. And although I own the episode as an MPI VHS, it was clear enough to spot what was going on. Too rich!
"Major flaw in the 1897 storyline"