Every estate or interest in lands created or conveyed without an instrument in writing signed by the grantor or his attorney shall be deemed an estate at will only, and no estate or interest in lands shall be assigned, granted or surrendered except by writing signed as aforesaid or by operation of law.
RSA 477:15
RS 130:12. CS 136:12. GS 121:12. GL 135:12. PS 137:12. PL 213 :15. RL 259:15.