The expedition's experiences led to some questionable conclusions being drawn. The monsoon conditions had been bad and climbing had not been possible over . Also, it was not realised that in 1935 the monsoon had been exceptionally late (starting 26 June) - at this time the timing of the monsoon was not really understood at all. The intended pre-monsoon 1936 expedition was wrecked by the particularly early monsoon that started that year on 25 May. All this led to no post-monsoon attempts being made on Everest until the Swiss expedition in the autumn of 1952 (see also 1975 British Mount Everest Southwest Face expedition) and it was only gradually discovered that the post-monsoon period is not necessarily unfavourable. The lightweight approach had, in itself, not been a clear success. Everest expeditions, and especially British-led ones, reverted to the large scale military type and this was to continue into the 1970s. Tilman and Bryant had not coped at all well above and so they were ruled out for 1936. It was not understood at that time that a climber's acclimatisation can vary greatly from year to year.