When people talk about ghost signs they usually mean wall signs advertising a brand or business that may or may not still be around but was once promoted in a grand, or at least large-scale, manner.
There is another class of ghost signs, however, that is spookier. These are the vacant frames of (usually) unknown businesses emptied of their most critical content. They are still standing only because no one has taken the trouble to pull them down. These mostly mute signs have a charm of their own, intriguing in their very blankness.
