Building Age and Builder's Journal
The most famous of the moved mansions in Los Angeles is the Higgins-Verbeck house, which was built at 2619 Wilshire and moved to 637 South Lucerne in 1924. Part of the story is that a party was going on in the house as it moved west. I just found this shot of a rear section of the house trundling down Wilshire with revelers at the windows.... Full story here:
Wilshire Boulevard Houses