Letter written March 20, 1865 by Mrs. Lincoln to a friend: "We went to the Opera on Saturday eve; Mr Sumner accompanied us - we had a very gay little time. Mr S when he throws off his heavy manner, as he often does, can make himself very very agreable[sic]. Last evening, he again joined our little coterie, & tomorrow eve, - we all go again to hear 'Robin Adair,' sung in 'La Dame Blanche by Habelmann. This is always the pleasant time to me in W. springtime, some few of the most pleasant Senators families remain until June, & all ceremony, with each other is laid aside. Mr L most probably, goes down to the front (entre nous) this week & wishes me to accompany him - I gladly seize on any change that will benefit him."