another source of dubiety for them was the existence of certain letters obtained by some nameless civil servant in sub-basement 4 in the hall of records which indicated that bussabas mother was of a good family in a foreign kingdom : apparently this was meant to account , justifiably and without embarrassment , for the color of bussabas eyes and skin ( which , in any case , could not be determined if one went solely by the bronze sculpture of his likeness ) .