Mendocino County Remembered, An Oral History Vol. 1 (A-L) (1976?) 
by William Bradd,Lana Krasner, Gloria Petrykowski, Rosalie Zucker
A Commemoration of the American Bicentennial

Interview with George Emerick (page 129)

I knew Portugese Frank, didn't know him very well,
exchanged with him quite a few times. I knew him after he got in
that little saloon there up on the road from Comptche to
Mendocino. I never knew him before that. But I had heard of him
long before that. Yeah, old Portugee Frank. He and Nigger Nat.
Nigger Nat used to say that he and Portugee Frank were the
two first white men to come to the County. (LAUGHS) Nigger
Nat was Black. He was pretty Black. I knew him too.