Madura motifs

[Gavin Nugent]

I was visiting a friend recently and we were going through a number if hulu and keris he'd purchased from me over the years.
It was good to see these items again, and together always adds context sometimes not seen or fully appreciated individually.

What stuck with me after returning home, was the old Madura hulu.
Some had the Pegasus, another the Griffin like creature within the carvings.

I may be looking in the wrong places for the insights I hoped to gain as traditional searches turned up little to nothing on the subject.

For those more learned on the subject, where can information on these two icons be found?

With thanks

Gavin