Legion of the dead - Paul Stewart

Barnaby Grimes is a tick-tock lad, high-stacking his way across the rooftops of his city in search of adventure and mystery. In each tale, he encounters a supernatural force and must battle the horrors that await him.

In LEGION OF THE DEAD, Barnaby finds himself embroiled in a plot that includes a legion of zombies raised from the dead. In Dickensian times, people were terrified of being buried alive, and so were left in their coffin with a wire, attached to a bell, running from above the ground, down through the earth and the lid of the coffin, and tied to the little finger of the buried body. Those who found themselves awake in the darkness of their coffin could wiggle their finger and summon help. And so one night, Barnaby makes a shortcut through a graveyard and is horrified to hear the tinkling of dozens of little bells...