It is as marvellous and inexplicable as the migration of birds

TCD MS 10515 folio 16v

TCD MS 10515 folio 16v

[March 6th 1916]We were steaming up the Gulf about midway between either coast, we were far out of sight of land about sixty miles from shore. One locust which came on board whose course I followed, when released, flew off in a direct line as though it recognized that it was travelling in a definite direction. It is as marvellous and inexplicable as the migration of birds that a solitary insect can fly in a true course over a distance of 110 to 130 miles (greater in the Red Sea) from shore to shore across the trackless ocean. A locust, I calculate, will occupy on this journey about 15 hours so that it must travel both by day and by night, and one specimen that was captured on the ship came aboard after dark.