back in the 1880's timekeeping wasn't nearly as significant a matter as it was then. a child born at 11:45 pm on Sunday could be two days earlier than a child born 12:05 am on tuesday, despite being only 25 hours apart. Add that to the fact that sloppy timekeeping could vary a few hours, "sunup" ; "noon" ; and "sundown" were the important times to an agricultural society. So my bet is - a sure possibility for those twins.