Hi, Have you ordered a copy of Elsie's obituary? Her children should be listed in the obit.
I tried to find death info for Lawrence but didn't find any.
Even if Larry had remained in the Imperial or San Diego counties, the only record of him that you'll find now will be if he purchased a home or land. If you want to pursue that, contact the respective counties Clerk-Recorder's offices. However, it will be difficult to know if you find YOUR Lawrence Anderson. Successful Searching!