Halsam American Brick Build - Two Story House

In the mid-1950s' Halsam offered interlocking brick building toys made from pressed wood. I'm assembling each of the models shown in the instruction booklet for their 60/1 and 60/2 building sets. I'm calling it the Halsam American Brick Build.

The second build in the instruction book was a two-story house.

The Halsam book is very carefully laid out. Each structure subtly introduces a core concept in block construction. For example: in the plans above, note that there is an extra yellow brick inside the house. The reason it's there is so you can place another brick on it that will connect it to the two bricks in the door frame. This ensures the exposed yellow bricks of the door don't pull apart.

Also, note the line of yellow bricks separating the two floors. All of the windows on the first floor have a course of red brick on top, then the yellow. All save the window on the left side of the house?

Why? Structural integrity. In order for a brick to span an opening, it needs to be secured with a brick that connects it to an adjacent brick.

In the photo above, you can see the red brick secures both the yellow brick spanning the door frame and the left side window frame. If the window was one course lower (as it is in the rest of the house), it wouldn't be possible to position an 8-peg brick that straddles two other 8-peg bricks to secure it.

Conversely, as you can see in the photo above, it's impossible to move the other windows up a course. There are no 4-peg yellow bricks, so the yellow brick would have to rest solely on the paper window.

Note the right side second story window. Its bottom frame is
yellow brick.

The end result is a house with windows that aren't completely symmetrical. But as you can't see the right and left sides at the same time, it doesn't matter that much. 

On the left side of the house, the first story window had to be moved up a
course. That meant the second story window also had to move up.
It's one row above the course of yellow brick.

The back of the structure. The windows are all in alignment.