TCD MS 10516 folio 71 recto
[12th October 1916] all over the globe has been discussed by our greatest Naturalists, and different theories have been advanced to account for this strange similarity. I used to sit on the bank of the great river and watch the water insects moving in its shoals and eddies. I might have been gazing into an English stream. One (Spec. No. 21) was an interesting little creature. A number of these insects would collect into a group and choose a sheltered inlet on the river bank. Here, all facing in the same direction, they would move incessantly on the surface of the water, sometimes turning in circles, sometimes twisting in rapid convolutions. On the slightest disturbance, the members of the group separate, all darting about in the greatest excitement. Their main sense is that of touch