...the naturalist arrived in the country, and it had been of late years more intimate than ever. Sumner had been tenderly affected by Agassiz's refusal to have his name count against his friend in the San Domingo controversy. Mrs. Agassiz, in her reply to Sumner's letter of condolence, recalled his letter of congratulation on their engagement twenty years before. Sumner wrote to the Duchess of Argyll, D...