That has sorted Bertha Brassington out. I'm sure Menfreya will be very pleased.
Have you by any chance lost a John Brassington. He & his wife Ann have a son Samuel Brassington chr. 1822 Blackfordby, Leics. On the 1851 census Samuel is a potter.
It looks like they are the 1st family of Brassingtons in the area. I wonder if they have drifted down from the Potteries.