Frank Alvord Perret was an electrical engineer from Brooklyn, and a genius with an ordinary Kodak. He took at Vesuvius, by sheer daring, the most remarkable photographs ever made of an active volcano. His knowledge of astronomy, meteorology, and physics made him see in a volcano something to study close at hand, as Benjamin Franklin studied a thunderstorm. He developed and printed his photographs himself, and colored his lantern slides. He helped Matteucci, the observatory director on Vesuvius, and was decorated as Chevalier by the King of Italy. He tramped close to lava vents and explosion clouds, and took hundreds of pictures. Perret and I had exactly the same conception of a volcano. We thought of it as a living organism to record, just as rainfall is recorded by the weather man. For our recording, we had to invent volcano instruments. Though the camera was Perret’s supreme instrument, he had been an electrical inventor all his life. Businessmen in Springfield, Massachusetts, financed his work in Italy; and I went to Springfield to lecture and encourage their research association, the predecessor of our Hawaiian association. Perret photographed Etna, Stromboli, Teneriffe, Sakurajima, Kilauea, the Carib cones and other volcanoes, and performed heroic work at the Messina earthquake of 1908. When, in 1929, Pelée entered into another of its periods of exploding and heaving it was studied critically by Perret who had established a museum and observatory at Martinique. He finally settled down at his museum in St. Pierre, and was of great service at the Montserrat earthquake crisis of 1933 and thereafter. He was not physically strong and the volcanic dust gave him pneumonia, but several times he recovered from attacks. He died in New York, having been forced north by the second World War. I also met the Yorkshire oculist, geologist, and photographer, Dr. Tempest Anderson, on Vesuvius in 1906. This was another happy meeting. He too was a skilled volcano photographer, and had taken pictures in New Zealand and Iceland with his privately built cameras, using methods of extreme originality. He afterwards made for me a camera with small glass plates, dark chamber, arm sleeves, no plate-holder, alpenstock tripod, bottle strip-testing developer, self-drying metal case, and great perfection of rigidity and focus. We were to meet again and again in different parts of the world. He became one of the British experts sent to Soufrière by the Royal Society. He died of typhoid on a volcano voyage to the Philippines.