April 2026

Dear Friends of Diego,

One of Diego Rivera’s recurring themes in his U.S. murals is the reconciliation of Art and Science. He knew there was a synergy in their fusion. Our long-time partners, Cultural Heritage Imaging, have just published their 3D documentation of SFAI’s Diego Rivera mural, The Making of a Fresco Showing the Building of a City, 1931The mural is in pristine condition. Public access awaits the infrastructure improvements to re-open the old SFAI campus.

 
Like CHI’s previously published Diego Rivera’s San Francisco Masterpiece Virtual Preservation of “Pan American Unity”, these records, archived at Stanford, leave future generations analytical benchmarks for the physical state of these two San Francisco legacies, which can last centuries. Moreover, the mural was moved and data about the logistics is available. Atthowe, the art movers, recently published a synopsis of “moving the unmovable.” Here is a link to the UNAM’s team report about Wire Rope Isolators and Real-Time Vibration Monitoring. The mural has been blessed with high-end documentation by world-class entities.
 
Hopefully, we’ll get a chance in the future to generate a similar photogrammetric record for the City Club’s Allegory of California. Logistically, it is the hardest to record because of the physical constraints of a stairwell.
 
Antonio Sotomayor

A friend recently convened a group interested in local artist Antonio Sotomayor. The Bolivian-born artist had come to San Francisco in 1923 and had gotten a job as a dishwasher at the Palace Hotel. But he was soon “discovered” and became the hotel’s artist. The group included art historians from Grace Cathedral and Treasure Island, an art conservator, two scholars from the Bancroft Library, and owners of pieces by Sotomayor. My connection with Sotomayor dates back to December 2006 when Lynn Wagner, the daughter of Mona Hofmann, a Rivera assistant and friend of Sotomayor, gifted City College her mother’s remaining papers, which I picked up in Los Angeles. Lynn is the seven-year-old girl sitting and drawing in upper panel 4 of the Pan American Unity mural. She shared an anecdote that Diego would buy her “good” watercolors on the condition that she spent the money on things her mother wouldn’t approve of. Her mother didn’t approve of the pact, but she had a close relationship with Rivera. He wrote the “Queen of Sheba” near her mural image and gifted her a 1930 self-portrait lithograph, signed twice. This was the crown jewel of the treasures we received from the late, very generous Lynn.

 

Mona and her husband had commissioned a Richard Neutra Hillsborough house and had Sotomayor paint El Tigrero in the house. In 1934 Mona had assisted Rivera at Bellas Artes, when he recreated the destroyed Rockefeller mural; the original was smashed to pieces in the middle of the night on February 10, 1934. She was the first assistant to Rivera on Pan American Unity,  but had to leave for health reasons. She would be treated by Dr. Leo EloesserFrida’s doctor and confidant. In a marvelous coincidence, when I got home from the meeting I received a call from a local realtor, who had come across a Sotomayor painting in a Pacific Heights house she was selling. Several of us were able to see this piece.

 

Sotomayor painted murals at Grace Cathedral near the end of his life. His nearby house was at H3 LeRoy Place, which Grace and he occupied for 40 years.  In 2013 I was invited to tour the house, which was just as he left it. There was an autographed photo of Pierre Salinger, President Kennedy and LBJ’s press secretary. Pierre’s mother Jehanne (née Biétry) Salinger was a local art dealer, lecturer, and editor of Argus Art Magazine.  Also on display was a book dedicated to Dr. Leo Eloesser by Spanish Civil War medical comrades with an inscription ala “In solidarity we stood up to our elbows in blood…” San Francisco seemed like a smaller place then and the stories often overlapped.

 

Sotomayor was part of the Bay area artistic community drawn to Diego Rivera upon his arrival in 1930. The photo below is indicative of Diego Rivera’s influence.

 
 
Here is Rivera in 1940 with some members of The Family Club, a split off from the Bohemian Club. These are mainly artists Rivera met on his first 1930 visit. Left to Right, Standing Lucien Laubdt (Beach Chalet), Antonio Sotomayor (Grace Cathedral), José Moya del Pino (Coit Tower), Otis Oldfield (Coit Tower), William Gerstle (SFAI), artist Phil Little, architect Timothy Pflueger, seated are Diego Rivera and Charles Black (head of PG&E and Shirley Temple’s father-in-law).
 

Johnny Cumming

In a second coincidence, the memory of Johnny Cumming was invoked. In 2007 Marshall McLennan had contacted me to take exception with the attribution of the little boy in the lower center of the mural as Donald Cairns, Emmy Lou Packard’s son. Marshall insisted he was the figure and told me a story about Johnny Cumming. The artist was rooming at Marshall’s grandmother’s boarding house on Leavenworth and assisting Diego at the fair on Treasure Island. One day Johnny took Marshall to the fair. Rivera asked Marshall to model  as the figure of the boy in the drawing below. However, later when it was time to model for the portrait in the mural, it was Donald Cairns who got the gig. Rivera added the figure of architect Timothy Pflueger, where the surveying instrument is to the right of sculptor Dudley Carter. The red grid allowed the scale drawing to be enlarged to full size.

Untitled, study for the mural Pan American Unity, Golden Gate International Exposition, San Francisco, 1940, SFMOMA
 
However, this wasn’t the only important information we found. We had a picture in which most of the figures were identified, except for one. The younger man in the center of the photo was still an unknown. On a hunch I sent the image to Marshall and he confirmed that it was Johnny Cumming, who he said had “flaming red hair.” This is where I went astray. In the roster of fair employees, there was a “J.E. Cumming.” I jumped on it and followed the trail, although it turned out it wasn’t our Johnny. Beware of imposters.
 

Recently, CCSF Librarian Lisa Velarde, was contacted by a relative of Johnny Cumming and in doing research in Julia Bergman’s Rivera Collection came across the real Johnny Cumming; John Noble Cumming. As Marshall had told me years ago, Johnny died in a B-29 crash late in WWII, not quite 24 years of age. In this picture, he was 20 years old. This picture has kept Johnny Cumming alive for me. It also turned out, amazingly, that Johnny had previously known Rivera in Mexico, when the Cumming family fled China in 1934. Johnny is reportedly a figure in Man, Controller of the Universe according to his family.

 
 

N.D., Left to right: Edward G. Robinson, Ottorino Ronchi, Irene Bohus, Timothy Pflueger, James Noble Cumming, Dudley Carter, Mona Hofmann, Diego Rivera