Hi Charlotte
I haven't been able to trace Eliza on subsequent censuses or any remarriage on Free BMD. My thoughts were that if she was alive at the time of her husband's death she would have been more likely to have been the informant? However, it seems a niece, Frances Mooney, from Derby was the informant of James's death, and 'Edward Bell Master of Union workhouse Northampton' for their son Joseph.
John