Governors of Mexican Alta California granted ranches to well-connected petitioners. One such piece of land near Elkhorn Slough was called Rancho Moro Cojo (Lame Moor Ranch), granted in 1825 by governor Argüello to María Antonia Pico de Castro. Later, it was only part of Rancho Bolsa Nueva y Moro Cojo (New Hollow and Lame Moor Ranch). On the diseño digitized at OAC appears the name "Bolsa del Cojo" (Hollow of the Lame One).
Bancroft mentions "the Negro Bob", a man of African descent left behind from a British ship and already living in central California at that time. There may have been a few more Black men in the province but I have no information identifying any of them as North African.
Was Bob the lame moor, or is it a Biblical or literary reference, or what?