Travelling during Noakhali riots, Manu told Gandhi she had mislaid his pumice stone. Incensed, he ordered her to revisit their last stop. The terrified Manu, just 16, walked 30 miles. Gandhi later told her: Had a rioter assaulted & killed you my heart would have danced with joy.

Here is Rajmohan Gandhi describing the grisly incident though I had read it first in Kriplani's biography of Gandhi. It totally creeped me out then, as it does even now.

Manu was only 16. Gandhi made her walk alone through dense jungle and rioting villages. For his pumice stone.