If you are viewing the structure from an angle, you will be able to see two faces of parts of the structure. The correct angle is not from NNE, but you are close.
Thanks everyone. You may be amused to know I had found Maya Angelou by adding three letters in third row conventional view. That has wasted a lot of time but increased my knowledge of MA. How clever of the setter.
After much staring, and with all the assistance provided here by others on the endgame, I can finally see how all the elements come together - except for one: where is the G in the author's name?