If the person first entitled to bring an action for recovery of real estate is an infant or mentally incompetent at the time the right accrues, the action may be brought within 5 years after such disability is removed.
RSA 508:3
RS 181:2. CS 192:2. GS 202:2. GL 221:2. PS 217:2. PL 329 :2. RL 385:2.