Hi from finally raining in St. Louis, Question: Do the publication dates for the three Sowerbys overlap each other? In doing some work this afternoon, I think I found an author as "Sowerby, 1842" but then found a different shell with the author as "Sowerby II, 1842." Do these both exist, or should they both be Sowerby II, as the descriptions have the same date? Thanks, Linda