Sentence:  But, at the least, these gentlemen must have had two votes between them—that is to say, they could dispose of a fifth of the whole voting power which Great Britain, with its millions of holding, is ever to hope for according as far as the <WSD>Lessepsian</WSD> agreement goes. 
Meaning of the word marked with <WSD> tags:  Pertaining to the French diplomat (Ferdinand de Lesseps), who designed the Suez Canal.