after consultation with the President, courts, or heads of departments,
as the case may be, upon the subjects of examination, and also whether
the examination shall be oral, written, or both, and shall have full
discretion as to the regulation of the examinations, and may employ
such learned and honorable men as they may see fit to assist in the
examinations, or to superintend examinations in their absence, and
shall report their doings annually to Congress.