The Bus Rooftop Was Not Wide or Long Enough

"The Bus Rooftop Was Not Wide or Long Enough" from Nathaniel Dusk II #3 (DC, 1985) by Don McGregor and Gene Colan

Some gorgeous Gene Colan art in this 1930s private dick's pair of mini-series, which DC published without inking. It creates a mood perfect for the piece. Well worth seeking out on the basis of that alone, though McGregor's scripts are worthy enough of the treatment.