[21] P. J. von Strahlenberg, Description of the North and Eastern Parts of Europe and Asia (English Edition, 1738, Table VII).
[22] Cf., inter alia, A. E. Holmberg, Scandinaviens Hällristningar (1848) (who wrongly referred them to the Viking Period); Hildebrand, ‘Forsök till Förklaring ofver Hällristningar’ (Antiquarisk Tiskscrift för Sverige, ii); Montelius, ‘Sur les Sculptures de Rochers de la Suède,’ Compte rendu du Congrès d’Anthropologie et d’Archéologie préhistoriques, Stockholm, 1874, pp. 453 seqq.; N. G. Bruzelius, ‘Sur les rochers sculptés découverts en Scanie’ (ibid., pp. 475 seqq.).
[23] C.r. Congrès, etc., Stockholm, vol. i, p. 466, Fig. 22.
[24] Sir J. G. Simpson, British Archaic Sculpturing, Plates XXXIV, XXXV.
[25] Op. cit., Pl. XXVII.
[26] ‘On the Tumuli and Inscribed Stones at New Grange,’ Dowth and Knowth, pp. 32 seqq. (Trans. of R. I. Academy, 1892.)
[27] Capitan, Breuil et Charbonneau-Lassay, ‘Les Rochers gravés de Vendée’ (Bull., 1904, Acad. Inscript. Paris); and see E. Cartailhac, Anthropologie, xvi, pp. 192, 193, who inclines to refer the group of monuments with which the authors compare the Vendée rocks to the Neolithic Period.
[28] See Coffey (op. cit., p. 33, Fig. 24), who first pointed out the analogy with New Grange. Compare another sculptured slab of the same dolmen reproduced by D. A. Mauricet (Étude sur le Manné Lud, Vannes, 1864, Plates VII-IX). Similar ‘ship’ signs occur on the slabs of Mein Drein.
[29] Ricardo Severo, ‘As Necropoles Dolmenicas di Traz-os-Montes’ (Portugalia t. i. Oporto, 1903).
[30] Don Manuel de Góngora y Martinez, Antigüedades prehistóricas de Andalucía, pp. 64 seqq.