Massachusetts Supreme Judicial Court January 15, 1867 (Nason v. City of Boston)

Wells, J.

This case does not raise the question whether the railroad track, and the ridge of snow which was thrown up by ithe cars, were, of themselves, defects in the street. Those ciricumstances are relied on merely as showing a special cause, other than the elements, for the condition of the sidewalk.

The defect alleged, which occasioned the accident, was the slippery condition of the walk.