I am reading Agatha Christie's Murder on the Orient Express and I noticed that at least two American characters say “Parrus” to mean “Paris”.
I guess that by this Christie hints at some difference in the pronunciation of the name of Paris in (the in-universe, as described by Christie) AmE vs BrE. Is that so? Which are the two different pronunciations?
EDIT: Kenyon and Knott's 1949 A Pronouncing Dictionary of American English doesn't seem to be useful, since it gives the more or less standard pronunciation /ˈpærɪs/, which is apparently the same as British one.