Introducing Grant Allen

See Three Or Four Victorian Books.

Dr Watson mentions The Origin of Tree Worship and then lists:

British Birds

Catullus

The Holy War

Poul Anderson lists all four titles.

Boris Jardine suggests that Watson's The Origin of Tree Worship and Catullus are the same work.

Grant Allen:

translated Catullus' The Attis, which is possibly the work referred to by Doyle/Watson and Anderson;

was a neighbour of Arthur Conan Doyle who posthumously completed Allen's Hilda Wade;

wrote a science fiction novel, The British Barbarians, which describes time travel and was published in 1895, the same year as The Time Machine;

is mentioned by name in HG Wells, The Time Machine (London, 1973), 8, p. 52.

That does not tell us much about Poul Anderson but it is a set of literary connections that emerged when I tried to track down Anderson's reference to book titles cited in Conan Doyle's "The Empty House."

After all that, I need a hot chocolate.