My pal Rob Ketcherside recently passed along a link to an amazing map of Seattle. It’s the 1896 Anderson’s Street and Guide Map of the City of Seattle. (At present, as you can see, the map is for sale.) I have seen an earlier Anderson map and found it very useful for its details on city streets. What makes this one unique is that it’s the best map I know of that shows the planned South Canal across Beacon Hill in detail. This was the canal proposed by Eugene Semple. It was not built.
In addition, the map also includes a fine detail of the filling in of the tideflats, also a project of Eugene Semple.