Cathrine and Peter O'Leary
Katrina and Paul O' Leary
Cathrine and Patrick O'Leary
He fell and when he got up his wooden leg was stuck between two floorboards.
He fell and couldn't get up because his wooden leg fell off.
He fell and broke his knee. He couldn't walk.
Many of the buildings in Chicago were made of wood and other flamable materials.
Chicago had an unusually dry summer.
Lake Michigan had plenty of water to stop the fire.
They were directed to the wrong location based of a signal error, which allowed the fire to spread even more rapidly.
They had fought a fire the night before and were still tired.
They didn't know how to stop such a big spread of fire.