an award be made in favour of any claim not embraced by these principles and rules.
If, in the opinion of the said Board of Commiſsioners, or of the claimants, any books, records or documents in the poſseſsion or power of the Govermment of the Mexican Republic, shall be deemed neceſsary to the just decision of any claim, the Commiſsioners or the claimants, through them
