In all cases prior to the twenty-fourth day of September, 1913, where a married woman who was at the time a free trader by her husband’s consent has executed and delivered a deed conveying her land, without her privy examination having been taken, and without the written assent of her husband other than his written assent contained in the instrument making her a free trader, such deed shall be valid and effectual to convey her land as if she had been, at the time of the execution and delivery of such deed, a feme sole. This section does not validate such deed where it would affect the title to land or property of purchasers or their grantees or assignees from such married woman and free trader subsequent to the execution of such deed. (Ex. Sess. 1913, c. 54, s. 1; C.S., s. 3351.)