The report contains fragments of a commentary to A. А. Blokʼs datebook of 1915. Its features are briefly described. The focus is on the notes related to L. A. Delmas, the history of the censorship of the drama "The Rose and the Cross", the preparation of the book Poems of Apollo Grigoriev, the poetʼs response to the activities in the defense of the Jews (an appeal, a questionnaire, collection "The Shield" etc.). The purpose of the comments is to expand and clarify the context of some of Block’s entries in the datebook.