Crocheted Victorian collars

I need to do some research before

I list these Victorian crocheted collars on Etsy.

And all of these ones I have for a friend.

Aren't they all just stunning? Such a lost art.

Click on each image to see the details closeup.

Maybe I could start my research with the

Eight Thread Crochet Magazines Circa 1918

I already have listed in my Etsy shop.

If you have any information or sources

where I can start my research, please share.

(Is it just me or does the last one look like a thong?)