So, I have seen the post going around as to why Edwin has a magazine with Twink on the back. Firstly, he is reading The Strand Magazine, this issue specifically. (Wrote about it here too).
Secondly, Twink was a brand of fabric dye of the 1920s, and could be found as advertisements on the back of Strand magazines.
So, although it might appear comical to us now, well, consider that Edwin really read those magazines before without thinking or knowing what the word twink has been associated more recently.
Still, long live the Twink era.