Fancourt joined for the first time on 6 April. His absence on 7 April is peculiar. The set, as first issued, mistakenly credited Byng with all twenty sides. However, it was common for people to buy single records and to assemble sets over time. Records that credited Byng were not withdrawn, so one may find sets with Norris credited with anywhere between zero and eleven of the sides.
All copies have the same catalog and matrix numbers, regardless of who is listed as conductor.
Further complicating the matter, Adrian Bridgeman and Peter Parker have identified discs from this set published into the 1930s that credit Byng on sides that Norris conducted. The only disc known to have been published with two different takes is side 1, the overture. The two takes are quite different, with the timing of the performances disagreeing by five seconds. Peter Parker has observed that Norris was evidently far more strict than Byng about what sides he would accept. None of the Norris sides are take 1.