It has been shown by Bohn (_Die Propyläen_, p. 31) and Doerpfeld on technical architectural grounds that the Temple of Victory was not contemplated in the first plans for the Propylaea, but that the form of the Propylaea was modified during the course of construction on account of it. The earliest date thus obtained for the beginning of the present building is about 432 B.C. There is nothing to show what time the temple took to build. In point of style there is a great resemblance between the sculptures of the frieze, and those of the frieze of the Erechtheion, of which a part was being worked, as we know from the inscription, in 409 B.C. The frieze of Nikè Apteros may perhaps be placed between 430 and 420 B.C. Spon, _Voyage_ (ed. 1679), II., p. 105; Wheler, _Journey into Greece_, p. 358; Stuart, II., ch. V., pls. 12, 13 (from drawings by Pars, now in the British Museum); Ross, Schaubert and Hansen, _Die Akropolis von Athen; Abth. I. Der Tempel der Nike Apteros_, 1839; _Mus. Marbles_, IX., pls. 7-10; Overbeck, _Gr. Plast._, 3rd ed., I., p. 363; Bohn, _Die Propyläen der Akropolis zu Athen_, 1882; Murray, II., p. 179; Kekulé (and Bohn) _Die Reliefs an der Balustrade der Athena Nike_; Wolters, Nos. 747-760. For Doerpfeld's views, see Harrison, _Mythology and Monuments of Anc. Athens_, p. 356. For further references see Wolters, p. 284. A photographic view of the temple is given by Baumeister, fig. 1234; and of Nos. 421 to 424 in _Stereoscopic_, No. 121. THE WEST FRIEZE. [Sidenote: =421.=] The return of a slab of the north side, now at Athens, formed the left end of the frieze, and contains two figures advancing to the right to join the fray (Ross, pl. 11. h.). This is followed by slab No. 421, containing a battle of Greeks. In the first group on the left two warriors are engaged in vehement combat. The warrior on the left supports with his right knee the shoulder of a wounded comrade who has fallen at his feet and leans on his right arm. In the next group are two antagonists fighting over the body of a dead combatant, then a warrior who has overthrown his adversary and treads him down with his left foot. He raises his right hand to inflict the mortal wound, and may perhaps have grasped the victim's right wrist with his left hand. In the background is a trophy which appears to consist of a trunk of a tree, to which a helmet, shield, and cuirass have been attached. On the right of the slab is a warrior pursuing a foe flying to the right.--_Elgin Coll._ Pentelic marble; height, 1 feet 5-1/2 inches; length, 6 feet 8-1/2 inches. _Synopsis_, No. 160 (259); Ross, pl. 11, i.; _Mus. Marbles_, IX., pl. 9; Baumeister, fig. 1240; Brunn, _Denkmaeler_, No. 118. [Sidenote: =422.=]