Finish a half-bottle of F.F. Gebrandt's Tincture of Vigour
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Tip the bottle to get the last precious drops.
Unlocked with 1 x F.F. Gebrandt's Tincture of Vigour: Half-Full
Locked with A Person of Some Importance -
Spoonful by spoonful
One spoonful before each meal. Another before you extinguish your bedtime candle. It does seem to have an invigorating effect.