Combine dried orange peel, cardamom, ginger, cinchona bark, and vodka in a glass jar with lid. Shake.
Place in a dark area for 2 weeks and shake daily.
Strain the mixture with cheesecloth or fine strainer into another jar.
Cover the remaining chunky stuff with water and bring to a boil, then simmer with lid for 10 minutes.
Let cool to room temperature, transfer back to a separate jar, seal and shake.
Place in dark area for 1 week and shake daily.
Strain chunky mixture again into clean jar and add original liquid mixture.
Combine with rich syrup and shake.
Wait three days and clarify anything that floats to the top.
Transfer to a jar (dark preferred) and enjoy!