This low-spoiler guide gives you gradual hints to get past that blocker puzzle. Spoilers are behind a red button.
These guides are "progress aware". It means you can tell what items and things you have achieved and only see relevant hints, reducing spoilers to the max.

The hints are served at Nice Game Hints as it supports this kind of gradual hinting better.

https://www.nicegamehints.com/guide/will-of-arthur-flabbington/