HENEY HOMAN JEFFCOTT, who died on June 29, was born in Co. Donegal in the year 1877. In 1895 he entered Trinity College, Dublin, from the High School, Dublin, and had a very distinguished career there. In 1897 he obtained a senior exhibition at the final freshman examination, and in 1898 he was first mathematical scholar. In 1899 he graduated with a senior moderatorship in experimental science and a junior moderatorship in mathematics and a moderatorship prize. He spent the next year in London, and in 1900 returned to Trinity College and entered the Engineering School, where he obtained his engineering degree in 1902 with honoxirs in all subjects. In the same year he won the McCullagh Prize for a treatise on the theory of elasticity.