After removing the bench, we can use the mark left on the wall as a reference point.

He, from his face removing the gross air, / Oft his left hand forth stretch'd, and seem'd alone / By that annoyance wearied.

The beast that bears me, tired with my woe, Plods dully on, to bear that weight in me,

This Dostoevskeian solution may work for the poem, but it did not work for the Blakes, at least not at the time that ‘William Bond’ was written, c. 1804, as is shown by the struggles between Los and Enitharmon and by the torments of Albion.