Because the facts alleged in the "to wit" clause of the charging information was mere surplusage, the Superior Court was not required to include the facts in its supplemental jury instructions on the elements of being an accessory after the fact, and the Government was not required to prove the facts to establish the defendants's guilt. Other asserted errors concerning the Superior Court's exclusion of evidence and the court's failure to advise the defendant of his right to appeal, even if error, were harmless.