Metal Maps

Metal maps are a type of map that show the memories of manmade constructions such as buildings, roads, railways, bridges, etc. They are activated by fire."'As she dropped the match into the glass of water, a clear, silver-lined map appeared in the center of the sheet. It seemed etched, rather than painted, and the lines shone like mercury against the copper surface.'"- Narration, The Glass Sentence, Chapter 5: Learning to Read

Appearances of Metal Maps

 * The Glass Sentence, Chapter 5: Learning to Read

Sophia first learns about metal maps from a map of Boston in February 1831, kept in Shadrack Elli's Basement.