Three biographies
A short biography in German: http://blog.bruederbewegung.de/2017/02/100-todestag-von-edward-kennaway-groves/
John Owen: Edward Kennaway Groves: A Brief Biography in Brethren Historical Review, on http://www.brethrenhistory.org/qwicsitePro/php/docsview.php?docid=1920
John Owen: The Life of Edward Kennaway Groves; https://www.tentmaker.org.uk/product/biographies/life-of-edward-kennaway-groves/