For the matrimonial customs of low races, especially valuable are Krause, _Die Tlinkit-Indianer_ (Jena, 1885); Marshall, _A Phrenologist amongst the Todas_ (London, 1873); and the magnificent volumes of Paul and Fritz Sarasin, _Die Weddas von Ceylon_ (Wiesbaden, 1892-93). For examples of sexual practices, commonly regarded as survivals of original promiscuity, see Buch, _Die Wotjäken_ (Helsingfors, 1882); Kohler, "Studien über Frauengemeinschaft," in _ZVR._, V; Bastian, _Rechtsverhältnisse_ (Berlin, 1872); his "Eheverhältnisse," in _ZFE._, VI; and his "Matriarchat und Patriarchat," _ibid._, _Verhandlungen_ (Berlin, 1886); Ploss, _Das Weib_ (Leipzig, 1895); his _Das Kind_ (Leipzig, 1884); and Mantegazza's _Geschlechtsverhältnisse des Menschen_, constituting with the earlier _Physiologie der Liebe_ and _Hygiene der Liebe_ his so-called "trilogy of love." For the bearings of phallicism on the subject read Howard's _Sex Worship_ (2d ed., Washington, 1898), containing a bibliography. In this connection are also of service the works on "seignorial right," the most elaborate monograph being Schmidt's _Jus primae noctis_ (Freiburg, 1881), containing a full bibliography. See also his _Slavische Geschichtsquellen zur Streitfrage über das Jus Primae Noctis_ (Posen, 1886); his paper in _ZFE._, XVI; and Kohler's criticism, _ZVR._, IV, V. Against its existence as a right of the mediæval lord are Veuillot, _Droit du seigneur_ (1st ed., Paris, 1854; 3d ed., 1878); Raepsaet, _Recherches_ (Gand, 1817); Barthélemy, "Droit du seigneur," in _Revue des questions historiques_, I (Paris, 1866), a critical paper of value; and Labessade, _Droit du seigneur et la rosière de Salency_ (Paris, 1878). In his _Réponse_ (Paris, 1857) Delpit makes a vigorous and detailed reply to the arguments of Veuillot (early edition). See also Foras, _Droit du seigneur_ (Chambéry, 1886); and, for comparison, read "Bibliophile's" _Les nuits d'épreuve des villageoises allemandes avant le mariage_ (Brussels, 1877); Grupen's quaint _De uxore theotisca_ (Göttingen, 1748); and Fischer's remarkably valuable and interesting _Probenächte der teutschen Bauernmädchen_ (Berlin and Leipzig, 1780; reprinted, Leipzig, 1898).