While this may seem a truism, we need to consider the fact that bricks are generally rectangular. The square in general is perceived as an element of perfection or at least (and this is probably the case here) of particularity. We should also notice the use of the archaic "bricke" from the very first verse of the analyzed paragraph. .

             The feeling of particularity, combined here with a trace of awe and even fright is emphasized in the second verse: "which cunningly was without mortar laid". Indeed, here we have a construction, made of bricks, but without anything binding together. It is in part a ghostly apparition and the text does not allow us to believe from the beginning where the castle actually exists or not. .

             The following verse completes the initial image of the castle: the walls are high, but "nothing strong, nor thick". So, this would be a good moment to resume the first three lines that create an initial description of the castle. The castle exists, because it is made of square bricks, but it is a peculiar construction, because it lacks the essential element of any construction: mortar to bind everything together.

             Is Spencer trying to suggest that there are humans, hollow on the inside, spiritually empty, who become a realistic expression only because of the flesh and bones that hold them physically together? It may be so, but on the other hand, it may be that Spencer is creating the adequate space where to introduce the Lady of the palace (in the last verse of the analyzed passage). The lady obviously has to appear in a real-unreal location, because she herself can be perceived as a character of whose existence you are not sure.

             Returning to the description of the palace in the first set of nine verses, following an image that induces awe and an atmosphere of mysticism and mystery, the following verses proceed to a much brighter recreation of the palace's image. There is a golden foil and a real "brightnesse they dismaid".