I've been trying to find out more about Edgar Meyer. His father, Marc Eugene Meyer, generally known as Eugene Meyer, was born in 1847, and lived for many years in Los Angeles. He eventually moved to San Francisco, and raised a large family, which included Edgar, two sisters, and the youngest, Eugene, who was born in 1875.
Eugene, Sr., moved to New York to become the managing partner of the Lazard Freres office there in 1893. His son, Eugene, Jr., worked there too, apparently. Eugene, like his father, became very successful in business.
The two sisters married the Stern brothers, Abraham and Sigmund, in San Francisco --who acquired the Levi Strauss company, from Strauss when he died.
Eugene, Jr., became quite powerful in later years, in publishing and financial circles.
Notably, his daughter was the late and famous publisher of the Washington Post, Katherine Graham --of Nixon-Watergate scandal fame.
"C. Altschul" likely refers to Charles Altschul, a New York businessman who died in 1927, and father to Frank Altschul, a powerful financier in the 1930s and 1940s. I think that Charles may have worked a Lazard Freres, too. Given Altschul's effort to reach Dr. Dodge aboard
Carpathia, and ask about Edgar, this suggests and even closer connection between the Meyers at Lazard Freres, and Dr. Dodge.
In sum, the Meyer family had strong San Francisco connections. It seems that Dr. Dodge probably knew the Meyers, or the Sterns, or both.