Klingon mummification glyph

From Memory Alpha, the free Star Trek reference.

A Klingon mummification glyph is a form of carved pictograph writing used by the Klingon during their early history.

During Spock's memory test in 2286, he was asked to identify a particular mummification glyph, which happened to be from the earliest part of the Zanxthkolt Dynasty. (Star Trek IV: The Voyage Home)

This reference seems to indicate that Klingons valued the bodies of their dead at one point, which contradicts the line stated by Korris and K'Nera, in "Heart of Glory" (TNG); after death, the Klingon body is but an 'empty shell'. However DS9: "The Ship" introduced the concept of ak'voh, illustrating some Klingons thought the deceased body was important.

Some entrepreneurs on Maranga IV claim to have Molor's mummified head on display for a fee of 50 darseks per person. (TNG: "Firstborn")

This might mean that the Klingons kept the remains of important individuals while the standard warriors bodies were disposed off the most efficient and best way possible.