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From kingofmycastle@gmx.net:
Where is the fortress?

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From tek@evilsuperbrain.com:
Very impressive details. I like it.



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From tony@awmcs.net:
Wow! Though somewhat illogical it is the most unique interpretation of the topic I have seen yet!

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From ZenPsycho@yahoo.com:
hehe nice image. 





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From delfeld@mailcity.com:
The image actually explains the idea of a fortress.  There is what keeps things out, what is to be protected, and how the defenses facilitate the fort.  

It is very unusual, but a neat image all around.