George Bigelow Chase, Genealogical Memoir of the Chase Family (1869)
“ In 1861, Mr Theodore Chase's voluminous Collection of papers were submitted to Mr. Somerby for classification and to enable him to take full notes for investigations to be pursued by him on his return to England in the spring of that year. Mr. Somerby's investigations, which were very diligent and thorough, and which led him among the records of every county in England, continued at intervals for some years, until he had noted the names and dates of birth of all of the name of Chase during the latter half of the sixteenth and early part of the seventeenth centuries. ”
