However, Eastman needed him for the roller project, and together, they persisted.

In 1885, the Eastman-Walker Roll Holder received a patent. It revolutionized photography, allowing amateur photographers to take up to 50 photographs in an hour, and did away with the huge camera boxes and heavy glass plates of the era.

In 1885, to get rid of Walker's temper tantrums, but because he was a major stockholder, Eastman assigned him to manage the London office of Kodak. Walker introduced Eastman to the Dickmans of London in 1889. Several years later, as Walker's business sense drove the London office into the ground, and as Eastman finally tired of Walker's continual grumbling, Eastman fired him and replaced him with George Dickman.

How important was Walker to Eastman and the success of the Kodak company? He co-invented, with Eastman, one of the most successful creations that drove the profitability of the Kodak Company...
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