According to Israeli historian Yehuda Bauer, Weissmandl's proposal is the basis of subsequent proposals.[48] At about the same time, two officials of the Jewish Agency in Palestine separately made similar suggestions. Yitzhak Gruenbaum made his to the U.S. Consul-General in Jerusalem, Lowell C. Pinkerton, and Moshe Shertok made his to George Hall, the British under secretary of state for foreign affairs. However, the idea was promptly squashed by the Executive Board of the Jewish Agency.