No trustees or assignees of a railroad mortgage, who have the railroad in their charge, shall, as such and without their own default, be personally responsible for any damage, by collision or force, occurring to any passenger or freight upon the railroad.
RSA 244:6
1858, 2100:5. GS 151:6. GL 165:6. PS 161:6. PL 252 :6. RL 302:6.