In 2021, neighborhood historian Doug Decker, used pictures and maps to show the early days of Sullivan’s Gulch - both the neighborhood and and place itself. See the video, History of Sullivan's Gulch, at this the link.
Doug has now written up the information for a 4 part series on his website AlamedaHistory.org. He's included some new information and the old photographs and maps are available in higher resolution than on the video.
Sullivan’s Gulch: A look back in four parts
(+ bonus)
Chapter 1: Homesteads and railroads
Chapter 2: Manufacturing comes to the Gulch
Chapter 3: Old Lloyd Golf Course + Shantytown
Chapter 4: The highway nobody wanted (coming)
Bonus: What’s a Gulch and where is it exactly?