Sean Freeman

Long time ago (seems like a lifetime ago really) was shown a ground anchor system for descending cliffs without trees, or rocks for anchor points, very useful in snow conditions. Guessing your picket sys is similar.
Doc1.doc

Props to Treespyder for making Life on a Line available to all

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Sean

Trees are poems that earth writes upon the sky,
We fell them down and turn them into paper,
That we may record our emptiness.
- Kahlil Gibran