Every card in the Tacheles/Adolph Engel deck is duplicated in the Gypsy Witch. In fact, the Gypsy Witch is just a Tacheles deck with the addition of the Shepherd, Bear, Eye and Lion.
Some of the art is so similar that you can see there was some copying going on.
So if you wish you had a book about those crazy sigil decks, you probably already have one – a weird, unbound book first published over 100 years ago, no less! If you’re reading this, you’re almost certain to have a copy someplace – check the sock drawer, lol. If not, it can be purchased for about $7.
As for the sigils themselves, they’re purely for atmosphere. Like this old Myrna Loy flick. 😀
ETA: Compare to Whitman meanings at Andy’s blog here: https://andyscards.wordpress.com/2015/02/24/whitman-old-gypsy-fortune-telling-cards-meanings/