Before this chapter is closed, some personalities of the first decade of the Observatory should be mentioned. Foremost was L. A. Thurston, founder of the Volcano Research Association and its president for many years. It was his interest and enthusiasm coupled with that of the other members of the Association that made the Observatory possible. Prominent among those members was L. W. de Vis-Norton, for many years secretary of the Association and a devoted apostle of volcanology. Mrs. Isabel Jaggar, from 1917, was my helper not only as wife and amanuensis, but as general assistant at the Observatory. She could operate instruments, take notes at the pit, keep the record books, and act as buffer against an overinquisitive public. There was Demosthenes Lycurgus, genial Greek host of the Volcano House, who did all in his power to help us, by grants of lands, raising money, and personally promoting science with all the vigor of his wonderful personality. He went home to Greece to be married, and alas, died during his honeymoon. Later came my good friend George Lycurgus, who still operates the Volcano House. Colleagues of the founding decade included H. O. Wood, who came from Berkeley in 1912, acted as seismologist and geological assistant, and established a seismological bulletin. He left to enter the army in 1917. In years to come Wood established in Pasadena under the Carnegie Institution one of the great seismographic laboratories of the world, and his name became coupled with a California Institute of Technology physicist to name the Wood-Anderson seismograph. Later came R. H. Finch who had worked with Dr. Humphreys of the Weather Bureau in Washington and had been a flight meteorologist in Ireland during the first World War. He was assigned by Marvin to me as assistant in 1919, when the Congress took over our work for the U.S. Weather Bureau. Finally, I should like to name the numerous workers of the U.S. Geological Survey in topography and geology, notably Birdseye, Burkland, Stearns, Wilson, Clark, Meinzer, and Macdonald. These men brought to reality my Geological Survey estimate of 1899, when I recommended to Walcott a survey of the Hawaiian Islands. The Hawaii geologic survey included investigations of water, highways, and minerals, and was to map lavas, volcanic processes, and island growth. The annual cost of the work had been estimated at $22,000, including $6,300 for salaries in geology and $10,000 for the total cost of topography study, or $90,000 for five years. The project was begun in 1909 in cooperation with the Territory of Hawaii. In 1951 the mapping was completed and the cost had been many times the original estimate.