when the angel ... was departed, he called - immediately doing as directed, and thereby showing the simplicity of his faith.
a devout soldier of them that waited on him continually - of the “soldiers under him,” such as the centurion at Capernaum had (Mat 8:9). Who this “devout soldier” was, can only be matter of conjecture. Da Costa [Four Witnesses] gives a number of ingenious reasons for thinking that, having attached himself henceforth to Peter - whose influence in the composition of the second Gospel is attested by the earliest tradition, and is stamped on that Gospel itself - he is no other than the Evangelist Mark.