It appears that Chamberlain was born in New York in 1877, but emigrated to France and settled in Paris during the 1890s. He was still active up to the start of World War I, but nothing is known of him after that date. As he had an older sister Alice (b.1868) who lived until 1955, it is possible that Chamberlain died after 1939, which would mean that his works are still in copyright in the EU and other countries where the term is life+70. This less likely to be the case in Canada, where 1959 is the cut-off point.
So on that basis Chamberlain's works will be tagged as very likely to be PD in Canada, certainly PD in the USA (as all so far were published before 1923), but until his date of death is known, we will err on the side of caution and mark them as 'non-PD' in the EU. This can easily be reversed if he's shown to have died before 1939... — P.davydov 22:31, 26 December 2009 (UTC)
