As quoted from the above site;
" In January 1915 Bob Burman destroyed the engine of his Peugeot L56 in a race at Point Loma (San Diego), California. Peugeot declined on account of the war to provide a replacement. Burman turned to Harry Miller in Los Angeles, then the ranking genius in racing engine carburetion, not only to repair the bits and pieces of his shattered Peugeot but to configure it to the new 300 cubic inch limitation.

In the process of doing the almost-impossible – delivering a competitive 300 cubic inch engine to Burman in time for Indianapolis – Miller and Fred Offenhauser succeeded also in examining the innermost workings of the Peugeot L56. A 50-year history of Miller, Offenhauser and Meyer-Drake dual overhead camshaft engines followed."