From the Lodi Sentinel, 7 Nov 1918:
Leon K. David, vice president of the Vallejo Central bank, passed away at Vallejo Saturday from influenza-pneumonia. Deceased leaves a wife and four children. He was a native of Michigan, aged 39 years. He was the son of Mr. and Mrs. E. David of Lodi, who went to Vallejo Monday to attend the funeral. A sister, Mrs. Harley Wathen of Lodi, is also left to mourn his loss.
Deceased had visited his parents here a number of times at their vineyard on Kettleman lane.