Hi Alexey, yes please do sent the passage to me. I can do the translations from Russian at my end. My e-mail email@example.com
I can send you a passage from my paper but it is in Russian. It will take some time to translate it to English. Or I can send it to you on Russian and you will translate it with the On-line Interpreter.
The image of late Chosun hwacha you have published on your site is from "Yunwon pilbi" (1813) by Pak Jongyung. You can see the difference between the upper (1813) and lower (1474) images (from "Gookjo orye sorye").
Of the two Korean Hwachas, the top one is from the 1813 publishing while the bottom is from the 1474 publishing?