He might be touched by her gentleness, her patience, her willingness to make any sacrifice but THAT one; and if she should appeal to him some day, in some celebrated spot—in Italy, say, in the evening; in Venice, in a gondola, by moonlight—if she should be a little clever about it and touch the right chord, perhaps he would fold her in his arms and tell her that he forgave her.
There are no more uses of "chord" in the book.
Show samples from other sources
In her first day learning the guitar, she has learned how to play G major, C major, and D major chords.
My father and I would stay up at night and sing some of the songs together as he attempted to work out the chords on his guitar.