Each cow is escorted by two youths, one on each side, and a third figure, perhaps a marshal, at the head. Those of the escort who are on the side of the spectator are represented in vigorous action, guiding and restraining the animals by ropes, which may have been painted on the marble. All are clad in the himation, which in the figures actively engaged in controlling the cattle is worn so as to leave one or both shoulders free. Compare the description of Heliodorus, p. 147. In slab xxxix. the action is very animated. The youth, No. 85, leans back with his foot pressed against a rock, to restrain the cow. This motive is a favourite one in fifth century art. Compare the west frieze, No. 15; a metope of the Theseion representing Theseus and the bull of Marathon; the balustrade of the temple of Nikè Apteros (No. 429); and vase paintings as in _Journ. of Hellen. Studies_, ii., pl. 10. [Sidenote: 96.] In slab xl. the left lower corner is added in plaster, from the original fragment at Athens. In slab xxxviii. the cow's right horn must have been carved in the round, only the tip being attached to the background of the relief. In slab xlii., No. 96 has both hands raised to his head, as if adjusting a wreath. Compare the north frieze, No. 25. What was the number of cattle in this part of the frieze cannot now be ascertained, but there is evidence that there were at least nine, and more probably ten. [Sidenote: 91.] Michaelis (_Arch. Zeit._, 1885, p. 57), in placing xlii. after xl., makes the right hand seen on the left of xlii. to be the hand of No. 91 (= Michaelis, No. 115), and the portion of a cow's belly seen between 90 and 91 to be part of the cow on the left of xlii. It is to be noticed that the hind legs of this cow have been altogether omitted. There is a curious inequality in the depths of the relief in this part of the frieze. Slabs xxxix., xl. are worked more in the round than the remaining groups with cattle. [Sidenote: 100, 101.] [Sidenote: 102.] The fragment with the two heads, Nos. 100 and 101, may be, as Michaelis suggests, a part of the corner slab xliv., the two parts at present numbered as 101, 102 being different parts of the same figure. The positions of the head and the foot appear to agree. On the other hand, the surfaces of the two fragments have weathered very differently. On the return face of slab xliv. is the marshal, who forms the first figure of the east frieze, and makes a connection between the two sides, by looking back, as if to the advancing procession.