Presumably he attacked Ida in 1911. I've no idea what happened to Maud.

It wouldn't be
attempted murder if he'd done away with her.
JHW did dodgy things in the 1890s but it's pretty clear that 1911 saw him doing a whole lot worse.
AGAINST HUSBAND, ACCUSED SENT FOR TRIAL
The wife of a Stamford labourer told a terrible story of a fight for life to the local magistrate a crowded court on Saturday, and a result of her ..."
“... WIFE STABBED AT STAMFORD. CHARGED WITH ATTEMPTED MURDER. A affair took place at Stamford Monday mornlng, ... martiai woman name* Wright. It alleged that ...
This stuff came up when I searched with "John Henry Wright" Stamford ... he must have been in prison for something. If he didn't do anything like that it's a bit of a coincidence, don't you think?