No, 
it seems the Captain did not release the pendulum separately
If I’m not mistaken, @Limael started studying this art (working with a pendulum) - on his own, even before the Captain
it is the same tool of mantics as runes or tarot etc.
(Although, I’m sorry, runes are not just mantics. Mantics with runes is just the beginning)
you can study pendulum by yourself from appropriate literature or video courses
For me the best mantics tool is Mimir. 
For a long time I have been trying to pull myself together and start working with runes, but as always, the excuse is “lack of time”.