The mural, says Marjorie Harth, director of Pomona’s Montgomery Gallery, “is the college’s chief artistic treasure.” Until this fall, however, Harth considered that treasure incomplete.

Harth-Bedoya succeeds Larry Rachleff, who led the Shepherd School orchestras for more than 30 years before his passing in 2022. In the interim, the program has benefited from the leadership of a ...