After that came the tragedy of the day for me. An overhanging bough knocked off my glasses, and they sank in the black waters of the marsh and continued sunk, in spite of my frantic groping and diving for them. The rest of the day I realized how the blinded galley-slaves felt who were chained to the oar in mediæval times. The Banker kindly described to me all the sixty-five different kinds of birds he saw in that marsh. As my vision was limited to a range of about two feet, I did not see many more birds personally. In spite of my blinded condition, I did discover, however, another prothonotary's nest. I had taken hold of a rotten willow-stub while pushing the boat through a thicket. It broke in my hand, and there, in an exposed downy woodpecker's hole, was a newly made nest of green moss, with a few twigs and bark-strips on top, but no eggs. The fourth and last nest was found by the Banker, again in a downy's hole. He saw something move and thought it was a mouse or chickadee. Finally a long bill came out of the hole and then a head. It was a hen prothonotary building her nest. She had the hole already filled with moss, and was bringing in grass, and would whirl around and around inside, modeling the nest carefully. Within, she had lined it with grass, just as a chipping sparrow's nest is lined with hair. This was the last nest of the day. The Banker suggested that we stay over another night, but I felt that home was the best place for a blind man. My last memory of the golden prothonotary was hearing him call, "Tweet, tweet, tweet" from the willows, as we started back to the mill.