On Christmas Day fewer people are walking outside. It is noticeable that a fairly high proportion of the people walking look like they have to walk every day in order to walk at all. They take little steps. It isn't easy. They seem to be dealing with stroke or heart attack aftermath, or joints freezing up.

They must be around every day. They don't show so much in the general bustle, but they are there--bravely, persistently walking slowly down the sidewalk.