I've recommended this map numerous times - it is basically the 1868 6"/1 mile map photoreduced to 2.5"/mile with revisions upto c.1960 but because based on the 6" map has much detail, as you said visible only under a glass.
The best parish map I think is the 2miles to 1inch published with Moore's Diocesan History - it is too detailed to go on my web site (over 1MB at least) but I will put it on future editions of the CD ROM

Woods atlas is availble on Mormon microfiche - here the maps are so detailed that impossible except for a very generous company to put on site - I have tried scanning these in but scans are not usable unless at very great definition.