The license plates indicate that both cars were registered to Arthur E. Maumus of 860 Geary in San Francisco. Arthur was a jewelry salesman. The two people pictured are then likely to be him and his wife Mabel Maumus, who worked as a garment fitter.

Think that's a Boston terrier in the car. We love ours, who answers to Murphy and is a most amusing and intelligent dog. As you can see, they have expressive faces.

Bostons were the first breed recognized by the American Kennel Club and there's at least one photo of Lizzy Borden, years after the sudden loss of her parents, relaxing on the porch of her home with a Boston on her lap.

Madame is attired in QUITE an outfit. And hat.

Including the one on the woman's back?

...we have Point Bonita Lighthouse and Fort Barry on the hill above. Both are now part of the Marin Headlands section of the Golden Gate National Recreation Area as is Land's End where this photo was taken.

Some kind of Belgian Spaniel I think, and at least one French Bulldog, or Boston Terrier.