The creditor

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Just above the ball cock is the creditor, a shadowy figure, fearfully clutching his dowsing rod.

Despite the dowsing rod, which seems more of a drowsing rod, the creditor seems unaware of the dark green slurry slurping around his feet.  Grey suds are passing through small yellow eyelets.

In all this the ball cock remains inertly itself, withholding judgement, like a father waiting at home for the late return of his son or daughter.  The drowsing creditor is in the position of the son/daughter, and is staying out because he can’t face the ball cock (father), and thus fearfully preoccupied he is unaware of the slurry, rising now and soon to be sucking at his ankles.