530. Cod.Or. 5921 Undang-undang Adat 20 ff.; exercise book; 21 x I6V2 cm.; ff. 2r-6v: 8 lines (Arabic) with interlinear Malay translation; ff. 7r-20v: 24 lines per p.; neat writing; excercise book no. 84; Van Ophuysen coll. I ff. 2r-6v: Bab ad-da‘wa: Arabic with interlinear Malay translation; II ff. 7r-20v: Undang-undang Minangkabau; beginning with the definitions of hukum syara' and hukum ‘adat; about akal; division of undang-undang into 4 categories (undang-undang negeri, undang-undang dalam negeri, undang-undang luhak, undang-undang nan duapuluh); fasal pada menyatakan da'wa; some passages in Arabic. Not described in Van Ronkel 1921.

531. Cod.Or. 5922 Undang-undang Adat 23 pp.; Minangkabau; exercise book; 20 X A x 16 cm.; 12 lines per p.; fine writing; Van Ophuysen coll. Also called Undang-undang Minangkabau; the text begins with the traditional law givers, the division of law into hukum adat and hukum syara ’; the division of adat into: 1. cupak yang usali; 2. cupak buatan; 3. pusaka; 4. kata muafakat; 5. kata dahulu kata bertepati; 6. kata kemudian kata bercari; ending with criminal law. Van Ronkel 1921, p. 253, no. 643 (wrongly described as Cod.Or. 5916).

532. Cod.Or. 5923 Adat membawa anak turun ke air 18 ff.; exercise book; 21 x Wh cm.; 24 lines per p.; Roman characters; exercise book no. 87; Van Ophuysen coll. On the cover called Membawa anak Toeroen ka-ajer di Siboga, the text, ff. lv-10v, contains the customary ceremonies performed at Siboga (Sibolga) when a child is carried to the river for the first time. Van Ronkel 1921, p. 266, no. 683 (wrongly