They had agreed in whispers that this was one of those moments in which one lets bygones be bygones.
"The Pastor's Wife"
Elizabeth von Arnim
He ought to 'a' let well enough alone, bein' as Het was willin' to let bygones be bygones.
"Dixie Hart"
Will N. Harben
Can't you let bygones be bygones?
"Molly Brown's Orchard Home"
Nell Speed