[This is Guylaine Marilie's outdated but entertainingly written and well-illustrated reference on late Dwemer architecture. Excerpt is from the chapter describing the Second Empire style of approaches and defenses, and mentioning the common formal convention of the "Four Tests". The book also mentions that the Telvanni have adopted this Four Tests convention as an aesthetic element in their defenses and approaches to their towers.] "The Test of Pattern requires the observer to examine and analyze for patterns before he acts, with the understanding that many patterns are subtle or hidden.