Nothing on Papers Past... (apart from his death notices) as I've scoured that myself in search of information on James.
Ours will be one of the private family trees on ancestry.com. My husband is a WILLIAMS.
We were up at Whangaroa Harbour ten days' ago, and were speaking to someone there who told us of a book available in Kaeo, about early Whangaroa. Given Arabella was born there (along with siblings) it might be worth tracking down the book... unfortunately it was the end of the day when we were there and although we were told it was available at the library, we couldn't find the library, but there is a small museum, which was closed.
The FLORANCE spelling dominates, and is the only one I use in our records. I think only registrars and indexers use the other spelling! LOL!