I was delighted to find this information about Robert Musgrave Blackwell. I am a descendant of Robert's aunt, Annie Edith Briddon. Since I live in Hertfordshire, I was particularly intrigued by the county's mention re Edith Marian's will. I would welcome any further information on this or on anything else to do with this family.
Some of the events in Robert's life are reminiscent of those in the life of Edwin Augustus Owen (see
http://owen.cholerton.org/05_elias_33.php); my maternal grandparents were Annie Edith's daighter and a cousin once removed of Edwin Owen. Even with Edwin & Robert's distinctive names, in other countries or states they could quite easily bury their transgretions during their lifetimes (clearly not so once the Internet arrived), Similarly, in days of yore, it was quite easy to get away with identity theft - I've come across several such instances in my research - so, whilst it's more than likely that Robert was the man involved here, it just might be another man!
Thanks to all those who tracked down the information about Robert.
Moira