Truman by David McCullough:
The lunch was sardines on toast. The conversation dealt mainly with the campaign ahead and was not very private or revealing, since the President’s daughter, Anna Roosevelt Boettiger, joined them. Truman would later repeat only one remark of Roosevelt’s. The President told him not to travel by airplane, because it was important that one of them stay alive.
To his dismay, Truman noticed that Roosevelt’s hand shook so badly he was unable to pour cream in his coffee.