Mart, hmmmmm, walnut dominate in 1900? nope, and certainly not by 1910. Thing is, you see the Eastlake style in oak during this period (1890-1900) as they had the machines set up for walnut eastlake but no walnut! The solution? do runs of eastlake style in oak and sell as hotel or cottage furniture. By 1910 the craftsman style or mission style in quarter sawn oak ruled. Stickley opened in 1900 so by 1910, eastlake was dead as a door nail style wise and the age of Golden Oak was in full bloom. Walnut was over forested during the 19th century and it was just not available in the quantities needed as that century came to a close, which is why you sometimes see late eastlake in golden oak, it's kinda weird looking but hey, we ain't got no walnut so let's go with golden oak eastlake!
The problem for the furniture industry by 1900 was twofold, they literally ran out of walnut and 2, it's not so easy to completely re-tool their machinery from the eastlake style to craftsman or mission, that was a BIG design change and it took time for them to create new machines to build mortise & tenon craftsman style furniture.