Occasionally he is represented with a musical instrument, like the classical syrinx or Pan’s-pipe, in his hand, as in Fig. 48, as if to indicate the sweet persuasive influence of his word. In allusion to this thought Gregory Nazianzen remarks, “The Good Shepherd will at one time give his sheep rest, and at another time lead and direct them, with his staff seldom, more generally with his pipe.” In a fresco in 246 the Catacomb of St. Agnes the shepherd’s tenderness and pity are contrasted with the mercenary harshness of the hireling who careth not for the sheep, and who rudely seizes by the leg one that struggles to get free, while the Good Shepherd merely calls his sheep, and they hear his voice and follow him. Sometimes an Orpheus, to whose lyre the sheep seem to listen with pleased attention, takes the place of the Good Shepherd. [Illustration: Fig. 48.--Good Shepherd with Syrinx.] Sometimes the shepherd is represented as leading or bearing on his shoulders a kid or goat instead of a sheep or lamb. This apparent solecism has been thought a careless imitation of pagan figures of the sylvan deity Pan, who frequently appears in art in this manner. It is more probable, however, that it was an intentional departure from the usual type, as if to illustrate the words of Our Lord, “I am not come 247 to call the righteous, but sinners to repentance,” and to indicate his tenderness toward the fallen, rejoicing more over the lost sheep that was found than over the ninety and nine that went not astray. It was also, probably, designed as a protest against the rigour of the Novatians in refusing reconciliation to penitent apostates. Sometimes Our Lord, thus symbolically represented, is accompanied by one or more of his disciples, as under-shepherds to whom is given command to feed the flock of Christ, over which the Holy Ghost had made them overseers. In the Catacomb of St. Agnes is a remarkable fresco of a lamb between two wolves, over which is written the word SENIORES, evidently an allegorical representation of the story of Susanna and the elders, and in mystic form an image of the church surrounded by persecution, or an illustration of the words of Our Lord, “Behold, I send you forth as sheep in the midst of wolves.”