Claim: Backbone Flute, written and completed in the autumn of 1915, was originally called Verses for Her.
Evidence: Backbone Flute (Флейта-позвоночник, Fleita-pozvonochnik) is a poem by Vladimir Mayakovsky written in the autumn of 1915 and first published in December of that year in Vzyal (Взял, Took) almanac, heavily censored. The poem was completed in November, originally called Verses for Her (Стихи ей, Stikhi ei).