1 4 V O L U M E 1 3 , D O C U M E N T 4 5 6 b The contract in question is probably the divorce decree of Einstein and Mileva, which stipulated that if Einstein were to be awarded the Nobel Prize, the prize money (minus 40,000 German marks) would become Mileva’s property and be deposited at a Swiss bank. Mileva required Einstein’s agree- ment to dispose of the principal, yet not of the interest (see Divorce Decree, 14 February 1919 [Vol. 9, Doc. 6]). Einstein had named his sailing boat Lisa (see Einstein to Hermann Anschütz-Kaempfe, 16 July 1922 [Vol. 13, Doc. 292]). Hans Albert was studying engineering at the Eidgenössische Technische Hochschule.