Note 99 — Chapter IV · [38] Of Professional Duties in certain Cases which require a Knowledge of Law.
Reading edition
“The oath administered to the witness is, not only that what he deposes shall be true, but that he shall also depose the whole truth; so that he is not to conceal any part of what he knows, whether interrogated particularly to that point or not.” Blackstone’s Comment., bk. iii. ch. 23. vol. iii. p. 372.