Each stanza here feels like an attempt to see through towards something vanished. In the first, the people passed on; the second the day itself, and in the third... on the face of it a simple pond's surface but then that final word blows the whole thing wide open. The sense of loss, for so much and so many, is palpable. Just wonderfully expressed, @mamadini.
Thank you, lazarus. Your comments always bring such a lovely cast this way. :)