From Thomas U. Walter’s diary, Thomas Ustick Walter Papers, The Atheneum, Philadelphia, Pennsylvania.
Thursday, May 8, 1856.
Arrived at Pittsburgh at 1 A.M. Took lodgings at the “Monongahela House” — slept until 8 A.M.
Took a carriage and rode around the city — it was a Philadelphia look but excessively smokey and dirty — some well built houses, but no appearance of comfort. Allegheny City, on the other side of the river, look somewhat cleaner, but the whole region is filled with smoke and dust from the great number of furnaces always in blast., the factories and the steamboats, all of which use bituminous coal.