Would she ask him who this volunteer was?
No.

She went straight on to the most embarrassing question that she had put yet--referring to the volunteer, as if Steventon had already mentioned his name.
"What made Richard Wardour so ready to risk his life for Frank's sake ?" she said to Crayford.

"Did he do it out of friendship for Frank?
Surely you can tell me that?
Carry your memory back to the days when you were all living in the huts.

Were Frank and Wardour friends at that time?
Did you never hear any angry words pass between them ?" There Mrs.Crayford saw her opportunity of giving her husband a timely hint.
"My dear child!" she said; "how can you expect him to remember that?
There must have been plenty of quarrels among the men, all shut up together, and all weary of each other's company, no doubt." "Plenty of quarrels!" Crayford repeated; "and every one of them made up again." "And every one of them made up again," Mrs.Crayford reiterated, in her turn.

"There! a plainer answer than that you can't wish to have.