Okay, where I left off we were in Oakland's Lakeshore Highlands with two Yellands on one street.
If we go back up into the hills into the Piedmont Pines neighborhood we will come across the Hildreth Residence. It was featured in Sunset Magazine for being a unique use of a down sloping lot. The article, "They Park their car in their Attic" was about the home.
The home is very unique looking from the street. The home shows a shift from the traditional sloping catslide roofline and into a more angular version of the roofline. The home is in a word a cubist version of what the earlier storybook home had been in the 1920s and early 1930s. Off of the sidewalk features a small tower down to the lower living level of the home. The siding of this tower are alternating zig-zag black and white siding.
I have dubbed this style of Yelland to be "Hyper-Geometry". What I call the "Puzzle Houses" is an off shoot of "Hyper-Geometry".
In the town of Hayward on Prospect Avenue is the Peter C. Hoare Residence. This property, I suspect Yelland to be the architect. It is what I like to think of being on the drawing boards at the same time.

[Peter C. Hoare Residence]
The Peter C. Hoare Residence is one of the puzzle houses. I think at this point I should explain what a puzzle house is. A puzzle house is a home that is made up of several elevations of different houses stuck together forming one larger home. (If you imagine Main Street at Disneyland all the smaller facades at the street front and one unified building behind them)
Well, the Hayward Hoare House (there I said it. Hoare House) is made up of the houses on my street, including the Derry house, my neighbor's house and my house. element by element, but in mirror image.
For example on my street (Superior Avenue) right to left
1. buttress
2. window
3. fireplace
4. window
5. door
6. dormer
7. fireplace
8. catslide roof
9. wall
10. gable (represents Master Bedroom of Hoare Residence)
On the Hayward Hoare Residence. left to right.
10. gable (represents garage of Derry Residence)
9. wall
8. catslide roof
7. fireplace
6. dormer
5. door
4. window
3. fireplace
2. window
1. butress
Okay. I am sure I have just confused everyone. It becomes clear that the homes on my street, which are rather ordinary house by house, but when viewed as a collection that they were designed as an entire streetscape. The Puzzle houses being a snapshot of that streetscape.
I'll look for some better photos (4-14-2008 posted new photo of San leandro)

Updated the photograph of the san leandro puzzle piece houses.