Statistics for occurrence #1 of “J. G. Chase” in chapter 9 of Historic leaves, volume 8, April, 1909 - January, 1910:

...Brevet Major Thirty-sixth Massachusetts Volunteers, and some time city engineer of Charlestown. They had offices in Winnisimmet Square, Chelsea, and in Somerville. In 1862 he was in the office of J. G. Chase , C. E., later city engineer of Cambridge, and was most of the time engaged in running levels, establishing benches, and making plans for sewers; also in making preliminary studies and plans for the C...
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