Just one year after B&N made its most important expansion, the Buckingham School did the same, with the purchase of a large residence, constructed in 1859, on nearby Sparks Street. This became Buckingham's Upper School. In 1954 it was expanded with a new wing, named after former headmistress Marian Vaillant when the wing was again expanded in 1969. That same year the acquisition of property along Craigie Street provided space for the kindergarten and grades one and two in the newly constructed Morse Building.