Question No. 5 : Before proceeding to determine this question it would be well to advert to the legal position bearing on the matter As aptly stated in paragraph 1378 of Volume 12 of Halsbury 's Law: of England (Fourth ' Edition) "if an alteration (by erasure, interli neation, or other wise) is made in a material part of a deed, after it execu tion, by or with the consent of any party to or person entitle, under it, but without the consent of the party or parties liable under it, but without the consent of the party or parties liable under it, the deed is rendered void from the time of the alteration so as to prefer the person who ' has made or authorised the alteration, and those claim ing under him, from putting the deed in suit to enforce against an party bound by it, who did not consent to the alteration, any obligation, covenant, or promise thereby undertaken or made.