Marginalia to birchbark letters and some Old Russian epigraphic texts

This series of notes deals with several lexical (bebrъkъ ‘young beaver’, ryti rěku ‘to change the course of a river by digging a channel’, na časy ‘in time’), grammatical (object case variation in the name lists to commemorate during the liturgy) and phonetic (pronunciation of tense consonants reflected in writing) phenomena in birch bark letters (№ 7, 59, 445, 506, 508а, 508б, 522, 541, 542, 551, 559, 560, 561, 595, 765) and in two Old Russian inscriptions — on the Sterzhen Cross (1133 A.D.) and in the Church of Sts. Boris and Gleb in Novogrudok (12th c.). Some refinements to prior interpretations are proposed, and, in addition, some novel solutions.