Three or four persons had paused at various spots to watch the barge passing the bridge, and doubtless included in their notice the young gentleman in the boat; but probably it was only to one ear that the low vocal sounds came with more significance than if they had been an insect-murmur amidst the sum of current noises. 
Three or four persons had paused to watch the barge passing the bridge, but probably it was only to one ear that the low singing came with any significance. 