Every person of the age of eighteen years and married persons under that age, of sane mind, may devise and dispose of their property, real and personal, and of any right or interest they may have in any property, by their last will in writing.
RSA 551:1
RS 156:1. CS 158:11; 165:1. GS 164:12; 174:1. GL 183:11; 193:1. PS 186:1. 1923, 10:1. PL 297 :1. RL 350:1. 1943, 93:1, eff. March 30, 1943.