-In many real actions brought by or against an infant under the age of twenty-one years, and also in actions of debt brought against him, as heir to any deceased ancestor, either party might suggest the non-age of the infant, and pray that the proceedings might be deferred till his full age, or that the infant might have his age, and that "the parol might demur," i. e. that the pleadings might be stayed; and then they would not have proceeded till the infant's full age, unless it was apparent that he could not be prejudiced thereby. This parol demurring was abolished by the Stat. 11 Geo. IV. and 1 Will. IV. c. 47, as to proceedings under that statute, being chiefly decrees for the sale of real estate to pay debts. The parol demurring is not to be confounded with a parol demurrer, which was a demurrer put in for the first time at the trial or hearing of the action. - Brown. See DEMURRER, § 2. operate at all, or is essential in order to give to the instrument its legal effect. (3 Stark. Ev. 752.) The general rule with regard to the admission of parol evidence to explain the meaning of, or to add to, vary, or alter the express terms of a deed, is, that it shall not be admitted, except: (1) where, although the deed is clearly enough expressed, some ambiguity arises from extrinsic circumstances; (2) where the language of a charter or deed has become obscure from antiquity; (3) where the grant is uncertain, owing to a want of acquaintance with the grantor's estate; (4) where it is important to show a different consideration consistent with, and not repugnant to, that stated in the deed itself; (5) where it becomes necessary to show a different time of delivery from that at which the deed purports to have been made; (6) where it is sought to prove a customary right not expressed in the deed, but not inconsistent with any of its stipulations; or, lastly, where fraud or illegality in the formation of the deed is relied on to avoid it. If a clause in a deed be so ambiguously or defectively expressed that a court of justice cannot, even by reference to the context, collect the meaning of the parties, it would be void on account of uncertainty.-Wharton. PAROL EVIDENCE, (when admissible). Sax. (N. J.) 393; South. (N. J.) 452; 2 Whart. (Pa.) 75.