[1] According to his obituary in the British Medical Journal, Lewins was also 'in the expedition to the north of China in 1865 in charge of the hospital ship Mauritius, and was present at the capture of the Taku Forts, receiving the medal'.
He published numerous pamphlets on the subject, as well as being a prolific correspondent in certain quarters of the periodical press - including Knowledge, Journal of Science, Secular Review - during the latter decades of his life.
The clearest articulation of his ideas (which were often expressed using jargon and obscure phrases) can be found in Humanism versus Theism; or Solipsism (Egoism) = Atheism.
They went on to work together as peers on their atheist philosophy, Hylo-Idealism, which endeavoured to use scientific knowledge to show that the universe is best explained through a synthesis of materialism and (non-spiritual) idealism.
'[4] After Naden's death in December 1889, Lewins rapidly commissioned a memorial bust for Mason Science College,[5] which is now housed in the University of Birmingham's Cadbury Research Library reading room.