Here are some photographs of the voids in that tree

Here's just one of the voids after Pickles had removed the tied on branches.

Here's one that still had the branch tied on with that green string.

The above two images of separate voids that had been filled in deceptively show the green string pretty well.

Here's a photograph of the branches and string removed from the tree, the big branch that had been tied on, but which Pickles had discovered and removed a week earler, is not shown.