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Collingwood - JH has not been working much on his translation of Homer's 'Iliad'. He will not be attending the BAAS meeting in October: 'that sort of thing is more than I can face now'. De Morgan has sent him a spoof of the opening of book one of the 'Iliad' [JH encloses a copy].

Offers a theorem for the four colour problem, which has become an axiom in his mind, an example of Whewell's latent axiom, things which are not at first credible but which settle down into first principles, asks for Ellis' thoughts.

He admits that Columbus' egg is a myth. Discusses the relationship of obtuseness or acuteness of sides to obtuse and acute angles in a spherical triangle and proposes a theorem; has found nothing in the literature of the affections of oblique triangles. Accompanied by a drawing of a [spherical triangle?] with the note, "Yours came in after I had written the above. You are right, as here appears."