While serving as a missionary, he also contributed to Canada's natural history, writing on insects he discovered; he had a species of mouse and bat named after him.
Keen returned on leave in 1898 and his translated prayer book was published in 1899 in London by the Missionary Society.
[4] There were thought to be only about 30 people in 1999 who spoke the Haida language,[5] In the 1890s there were visits from the English Charles F. Newcombe, George Amos Dorsey from Chicago and a Scottish guide named James Deans.
Keen had to angrily take them to task after he travelled to confirm for himself that visitors had not only raided graves but also not restored them to there former state.
Keen wrote to complain about the desecration and challenged Dean to name his accomplices although he was clear that the benefactor of their work was the Field Columbian Museum and that the perpetrators were Americans.
[6] The British Museum bought a number of artefacts from Keen, including a model of a house and an attached totem pole which had been carved by John Gwaytihl.