Well, I hate to labour a point, but it does state on that first link, "Even in 1902 it was primarily a football ground..." and "... Yorkshire's headquarters were at Bramall Lane until they moved to Headingley in 1903." Agreed, Yorks CCC may have used the ground on occasions, like they use Scarborough today.
As for dating, the use of a monochrome photo could (and probably does) date it as far back as the 1950s.