Leaving out the question at issue, either of the parties takes resort to another; his previous statement is not consistent with his subsequent one; he insists on the necessity of considering the opinion of a third person, though it is not worthy of any such consideration; having commenced to answer the question at issue, he breaks off at once, even though he is ordered to continue; he introduces questions other than those specified by himself; he withdraws his own statement; he does not accept what his own witnesses have deposed to; and he holds secret conversation with his witnesses where he ought not to do so.