People   (Re-unions, trace old friends and relatives.)

A doctor john Snow worked with miners who had contracted the disease at Killingworth colliery and 8 years after the 1831 epidemic issued the following guidance to coal miners.
He stressed the necessity of scrupulously clean personal hygene. They should split their work into two shifts to avoiding taking food into the pit.
One can only imagine what the sanitary conditions were like below ground.