Not surprisingly, he was the first person to make use of the BBC archives. He also discovered that the widow of Albert Wood lived not far from him, so he had access to a unique archive of Rutherford's work on the acoustical methods of detecting submarines during the First World War.

This is a very comprehensive coverage of Rutherford's work and life after he left New Zealand, the most detailed of any of Rutherford's biographies. For that I highly commend this book.

However I cannot recommend it for events prior to Ern's departure from New Zealand. When I reviewed the book (generally good) I had to condemn this era as an example of the folly of using secondary sources.

As I am acknowledged as having helped on the New Zealand side I should explain. David first contacted me about 1978 for information. I sent him various information and emphasised several serious points, in particular that Rutherford's first research was actually published in his second research paper. I even stayed with David one night in England to emphasis this point. So it was galling to read (p604) that he has to ``thank Dr Campbell, of Canterbury College (sic), for the first glimmering of the idea that the time order of the work should be reversed.'' I had told him emphatically that this was so.

For someone who never set foot in New Zealand to comment (p61) ``It is impossible to determine with any precision what Rutherford himself was doing in New Zealand meanwhile.'' and (p61) ``The difficulty of tracing his movements continues throughout that last New Zealand winter.'' is just plain deceitful and highly misleading. Any student of those times knows that newspapers published lists of the passengers on every ship entering port, of train passengers and of newcomers to city hotels. And there is a wealth of other archival material, such as the records of Canterbury College and its library book loan list plus the University of New Zealand records, the Philosophical Society of Canterbury records and newspaper accounts of its activities, available to assist such a search.