The "Malraux" whom Linda tells about in The Mansion when she returns to Jefferson from fighting in the Spanish Civil War is Andre Malraux, the French novelist and socialist who fought for the Loyalists during the Spanish Civil War (241). Since he helped organize their small air force, Linda and Barton Kohl could have known him well.
When Gavin refers to "John L. Lewis' C.I.O." in The Mansion he is referring to the American labor leader who founded the Congress of Industrial Organizations in 1935 (236).
Born Vladimir Ilyich Ulyanov, Lenin led the Communist revolution against czarist rule in Russia, and was the head of the Soviet Union between 1917 and 1924. Gavin mentions him in The Mansion when he refers to Communist Russia as "Lenin's frankenstein" (259).
In The Mansion Mack Lendon's mother weighs close to two hundred pounds and "liked to cook and eat both" (205). Hence, she probably does not mind taking Tug in.
The deputy sheriff who watches over Montgomery Ward Snopes in The Mansion is named Hunter Killigrew. We assume he is also the unnamed deputy who escorts Mink Snopes from the jail cell to the courthouse at the beginning of the novel.
Hugh Johnson was the head of the National Recovery Administration (NRA), one of the government agencies that Franklin Roosevelt created during the Depression. In The Mansion Charles puts his name on the list of the people "they called communists now" (237).
Hopkins was an American social worker who served in Franklin Roosevelt's cabinet and was one of the President's closest advisors. In The Mansion Charles puts his name on the list of the people "they called communists now" (237).
Hoover was a founder and the first Director of the Federal Bureau of Investigation; he ran the agency from its founding in 1924 until his death in 1972. In The Mansion someone - Gavin is sure it is Flem - calling himself "Patriotic Citizen" sends Hoover a letter warning him about Linda as a "commonist" (269).