Some ten years later at the 41st meeting of the BAAS held in Edinburgh in 1871 August, Birt revisited Plato, his selenographical
efforts having been diverted in the intervening period, as I shall discuss later.
Indeed, if the Sun's selenographical latitude, BQ, is favourable, it can be followed until just after the First Quarter phase providing that suitable southern libration allows the terrestrial observer access to the region.
'Examination of the principal chart points to the probability that the Malapert Alpha massif and its associated ranges and the Cabaeus ramparts are all in their turn responsible for excluding sunlight from the regions in question by reason of their selenographical position and very considerable elevation above the mean surface.
Instead the present essay attempts to mark this year's anniversary by assessing both Wilkins' strengths and his weaknesses in the only way that seems to me to make proper sense: that is, in the context of the age and the selenographical
tradition to which he belonged.
Even before his involvement with the BAA he carried out a similar role in the Liverpool Astronomical Society and between 1887 and 1897 he published a series of 200 'Selenographical Notes' in The Observatory (Volumes 10-20).
E., 'Selenographical Notes: Riccioli', The Observatory, 16, 321-323 (1893)