The space has been left blankbecause it is difficult to make sense of the corresponding word in the MS—which looks like "ropert," or possibly "ropery," which latter (if it were an adjective instead of a noun) could make sense.
The O.E.D. meaning for "ropery" is "trickery, knavery, roguery." The word is now considered archaic, but perhaps it was in use in Louisa's time.
Another possibility is that "ropert" is a slip for "proper."