Defined in Francis Grose’s Classical Dictionary of the Vulgar Tongue as “a schoolboy’s game, played with small round balls made of stone dust, called marbles”, taw was a popular pastime for children in the 19th Century. One author called marbles a good substitute for bowls that could be played in different ways, but the most common was taw or ring taw.
Glig-gamena Angel-deod: Or, The Sports and Pastimes of the People of England; Including the Rural and Domestic Recreations, May-games, Mummeries, Pageants, Processions, and Pompous Spectacles, from the Earliest Period to the Present Time: Illustrated by Engravings Selected from Ancient Paintings; in which are Represented Most of the Popular Diversions (1810)
Marbles of the era were typically made of clay or stone. Below is a Victorian era description of taw.
Cassell’s Book of Sports and Pastimes (1882)