My book ; Westchester, California, was just published, and includes a brief summary and photograph of General Brent, one time owner of Rancho Centinela.
I belive you can search(for free) in the book and find it here;
I also cover the General in greater detail in an earlier book;
The General is covered in Chapter II.
Email me if I can be of more help;
David J. Dukesherer