FO 608/99
As reported by British Major-General Thwaites in February of 1919, Weizmann “wants to be able to give an assurance to the Jews throughout the world [that] a Jewish country will be established in, say, one or two years [by 1921]”
This was presented as a modest demand:
"He [Weizmann] does not want to push for extravagant claims for territory," and so "the Jordan as an eastern frontier [by 1921] would suffice as a commencement."
See:
State of Terror, 39