An atlatl was the weapon which had replaced the stone axe in the stone age.
B is walking with the atlatl in his hand, and armed with javelins.
This suggests, of course, that this may have been a dart for use with a thrower or atlatl.
The water jug, the aspergill, and the atlatl and quiver of lances disappeared from the table.
The derivation from atlatl, arrow, would seem ...