In order to understand In Search Of… The Dark Star, Jeb and Blake will first need to get Sirius; Sirius-B, that is!

Links from this episode:

Siris (A part of the Canis Major constellation)

Jeb discussed a couple of evocative artworks: Appeal to the Great Spirit (Dallin)

End of the Trail (Fraser)

North African musket (Moukahla)

Colonial Williamsburg

Hoop Rolling

Jacquard Loom

Punched Cards technology

The Hans Guggenheim art project

Isaac Koi UFO archives

The Tribal Eye BBC documentary series (YouTube)

Regarding Temple, Puhairich, Young, and The Nine

The Sirius Mystery by Robert Temple

Editorial letter about Temple from The Observatory

Dogon Shame by Phillip Coppens

Griaule's Legacy: Rethinking "la parole claire" in Dogon Studies

Pop Culture References (affiliate links):

Conjure Wife - aka Burn Witch Burn

Bewitched

Bell, Book and Candle

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Images:

The "orbit" of the Dogon dark star.

Nimoy posing with a tribal mask - our initial NFA image.

Later we get to see his legs in this seated NFA supplementary:

Hans Guggenheim initially appears in just a vest and pants.

Later, he too is in more of a Safari look, and has a professorial pipe as well.

Dr Gary Chapman, Astronomer

The man who first photographed Sirius B - Dr Lindenblad

A little of the FORTRAN code that powers the orbit animation in the episode:

We don't have enough information to know who made Nimoy's safari clothing, but if you want to try and track down a very close approximation, this example from J. Peterman's (est 1987) is as close a match as I've seen. You would still need to find it in a vintage shop because at present they don't sell these.