On the next pages you will be presented with indices of the maps of Boston. The maps are segmented into numerous plates. Use your scroll bars to navigate the map. When you have chosen a plate that you would like to investigate, using your mouse, left-click on that plate. A mapping application will be launched in a seperate window which will allow you to zoom, pan and choose different layers. Each layer is from a different year, thus allowing you to compare and contrast any given point in Boston over time.