Princess Louise, Queen
Victoria's longest-living daughter
The below newspaper articles prove that
Marquis of Lorne and Princess Louise visited San Francisco in Sept 1882,
although
no mention of the Cliff House...

Daily Alta California - 14 Sept 1882

San Francisco Chronicle - Sep 14, 1882

Daily Alta California - 14 Sept 1882

Los Angeles Herald - 14 Sept 1882

The below story claims
that Princess Louise visited the Cliff House, although
the above period stories do not mention such a visit.

New York Herald - June 7 1896