"Bonnie Brook" is the Yonkers home where Sarah B. and Frederick D. Blake lived, at least part time. There isn't any street address equated specifically with the name "Bonnie Brook," that I've found. The views in #1-3 (which Adeline identifies as being from Bonnie Brook's porch) suggest it was north of the downtown.

It's only a guess whether the house in #4-6 are Bonnie Brook since Adeline only uses "Bonnie Brook" in the captions for the views from the piazza or the Decoration Day baseball team and no where else. Nonetheless, Sarah standing in front of the house hints that this is Bonnie Brook, as well as the fact that these six photographs are together in the album. The house also appears in the background of other photographs throughout the album.

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Finally, the condition of photographs #1-3 obscures the house down the hill and along the treeline. If that house were clearer, it might be possible to identify the site of Bonnie Brook.