Rowling mentioned that she originally wrote a Weasley relative named Malfalda, who, according to Rowling, "was the daughter of the 'second cousin who's a stockbroker' mentioned in "Philosopher's Stone". This stockbroker had been very rude to Mr. and Mrs. Weasley in the past, but now he and his (Muggle) wife had inconveniently produced a witch, they came back to the Weasleys asking for their help in introducing her to wizarding society before she starts at Hogwarts." Malfalda was supposed to be a Slytherin and was to fill in the Rita Skeeter subplot, but she was eventually removed because "there were obvious limitations to what an eleven year old closeted at school could discover." Rowling considered Rita Skeeter to be "much more flexible." Rowling also admitted that the fourth book was the most difficult to write at the time because she noticed a giant plot hole halfway through writing. In particular, Rowling had trouble with the ninth chapter, "The Dark Mark," which she rewrote 13 times.