GEORGE OHR Vessel of white clay with closed-in

GEORGE OHR Vessel of white clay with closed-in rim, in sponged cobalt and brown pattern. Script signature. 2 1/2` x 3 1/2` (NOTES: `We were attracted to this because it is so obviously white, which was the ultimate challenge to potters. It`s white on the outside and inside, with a very nice kind of blue sponge decoration. Was this Ohr`s answer to the blue-sponged kitchen ware being produced in Ohio and Illinois in the 1880s and 90s? The Newark Museum has an example of Ohr`s spongeware in its collection.`)