I guess that is a moon in the background, and it sure looks like this flying horse is singing along with the boy playing the harp. Cool. (This comes from the amazing public domain book "The Man with the Hoe" illustrated by Howard Pyle.)
飛馬和騎士
boy、classical、flying、For Use、harp、horse、man、music、mythical、Pegasus、vintage by fb、wings、Wood Cuts
男孩、古典、飛行、用來、豎琴、馬、人、音樂、神話、飛馬、由fb復古、翅膀、木材切割
資料來源：openclipart ( https://openclipart.org/ )