As documented in our most recent volume, in the fall of 1922, Albert Einstein and Niels Bohr were both notified that they had won a Nobel Prize in Physics: Einstein was awarded the prize for the year 1921, while Bohr won the one for 1922.
In the warm exchange of congratulations reproduced here, we find Bohr worrying that he would in fact receive the Nobel medal and certificate before Einstein, who at the time of the ceremonies, held on 10 December 1922, was on an extended trip to the Far East and Japan. Einstein charmingly reassures Bohr of his friendship and admiration. Selected by Issachar Unna. [Nobel Letters PDF]