burying the scroll under the wyvern?

[Rique]

Hi,

 

I need a little help with this quest. On my first run I finished it without problems but now I simply cannot click on anything that pop the option to bury he scroll. There are two wyverns skellies on black meadows. One has a hidden "stash" on the skull that Durance spotted. But I am pretty sure it should be buried on the first (more on the right) since its head is placed slight more towards east but the only thing I am getting is a google with "mice on teeth" text.

Help?
Thanks in advance.

[draego]

The map shows the location

[Rique]

The map shows the location

Thank you so very much, there is third wyvern that... lol.