Passage: Along with the Great Bell, the belfry houses four quarter bells which play the Westminster Quarters on the quarter hours. The four quarter bells sound G♯, F♯, E, and B. They were cast by John Warner & Sons at their Crescent Foundry in 1857 (G♯, F♯ and B) and 1858 (E). The Foundry was in Jewin Crescent, in what is now known as The Barbican, in the City of London. The bells are sounded by hammers pulled by cables coming from the link room—a low-ceiling space between the clock room and the belfry—where mechanisms translate the movement of the quarter train into the sounding of the individual bells.

Question: Aside from the quarter bells, what other bell plays the Westminster Quarters?
Great Bell