G'day Turtle Old Man, Katlaughing, Masato Sakurai & Uncle DaveO,I'm somewhat surprised that so few know "back to taws" and "come to taws" in the sense of the base line in marbles (and, by extension, in other contexts). I certainly grew up with that sense in Australia ... despite not being a keen marbles player. My critical school years for exposure to the term were those of the 1950s, as I started school in 1950, in the southern suburbs of Sydney.
Regards,
Bob Bolton