The first legislation was in 1753 which set the minimum marriage age for 12 years for girls and 14 years for boys. In 1929, it was raised to 16 years for both genders. It was very common to find "full age" or "minor" listed in the age columns prior to the 1900s, full age meant 21 years or over and minor meant 21 years and under. Under 21 years of age required parental consent for marriage, which is why plenty of people gave their age as "full" which didn't require parental consent. But, in the 1900s, you had to have your birth certificate for marriage to prove your age. I remember the fuss getting married myself.