A boy was born, Op. 3 - A Boy Was Born (Theme) (Britten: A Boy Was Born (theme) [A boy was born, Op.3]|Ｂｒｉｔｔｅｎ：　Ａ　Ｂｏｙ　Ｗａｓ　Ｂｏｒｎ　（ｔｈｅｍｅ）　［Ａ　ｂｏｙ　ｗａｓ　ｂｏｒｎ，　Ｏｐ．３］)