Historical Map: Hudson River Tubes, 1909
Basically an advertisement for the newly-opened Hudson River Tubes - still in use by PATH trains today, over 100 years later - with the H&M lines proudly and boldly displayed in red. Planning for the future is also on display, making the service look somewhat bigger than it really was. From my limited research, it seems that the extensions shown in Manhattan were never actually built.
The Hudson Terminal Buildings (shown in the photo inset at top left) were replaced by the World Trade Center complex as part of the deal struck to allow the Port Authority of New York and New Jersey to take over the operations of the H&M RR.
(Source: Penn State Maps Library/Flickr)