Bairari runs to a handful of compositions, and it is among the briefest headings in the volume. Sections of this size are the clearest evidence available that the Guru Granth Sahib was compiled to record rather than to construct.
Consider the alternatives that were not taken. A compiler wanting a well-proportioned scripture would drop a measure represented by four hymns and place them under a neighbouring heading; nobody would notice, and the volume would read more evenly. A compiler wanting a comprehensive musical scheme would commission or admit further material to fill the section out. Neither was done, in this section or in any of the others of comparable size.
What was done instead was to give four compositions their own heading and their own place in a fixed sequence, which costs the volume a page and preserves a fact: this measure was used, by these hands, this much.
That is an editorial temperament, and it runs through the whole compilation. The Granth is unusually resistant to the kind of tidying that most anthologies undergo, and the result is that its proportions, its irregularities and its small sections can all be read as evidence. An anthology that has been improved cannot be used that way, and most anthologies have been improved.