Read it through once

During this ceremony the boys had mysteriously disappeared; and, when Mrs. March had tried to thank her children, and broken down, while Teddy wiped her eyes on his pinafore, the Professor suddenly began to sing. Then, from above him, voice after voice took up the words, and from tree to tree echoed the music of the unseen choir, as the boys sung, with all their hearts, the little song Jo had written, Laurie set to music, and the Professor trained his lads to give with the best effect. This was something altogether new, and it proved a grand success; for Mrs. March couldn't get over her surprise, and insisted on shaking hands with every one of the featherless birds, from tall Franz and Emil to the little quadroon, who had the sweetest voice of all.