Don't forget to record the letter at the top of the log.
Harry, Hermione and Ron infiltrated Gringotts with the assistance of the goblin Griphook and the use of Polyjuice potion. They managed to narrowly bypass the vault's securities before Griphook betrayed the trio and claimed Goodrich Griffindor's sword. The trio was forced to flee Gringotts on one of the bank's dragons. Hermione destroyed the horcrux with a basalisk fang.