The Case of the Golden Idol/The Untimely Passing of a Rural Gentleman

A man is laying on his bed with a nasty head wound.

The man
There is only one name in the entire scene, so by default that is the answer. It can also be assumed that he is in his own home by the fact that he has a portrait of himself on the wall.

The victim is Sebastian Cloudley.

The outfits
The first is clearly the portrait of him eating while in his dining attire. The white frock is carrying measuring instruments and has stains of unknown liquids. The frock is clearly the research attire. The victim is currently wearing a leather jacket, suitable for outdoor activities such as hunting.

The location
A window provides a sea view. The map on the wall shows that only one house has a sea view, the Blackfield house. Thusly, this is that house.

Filling in the scroll
First off is just stating that Sebastian Cloudley, lord of Blackfield is the victim.

The second part is figuring out just how he died.

The diary entries clearly note when the victim changed attire. But a closer examination of the date in the diary and the date on the calendar shows that the diary is for the previous day and as such is stale and can't be relied upon for the current situation.

There is a horse running wildly outside. There is a blood trail from the entrance to the victim. It is reasonable to assume that he fell from the horse while hunting and got a nasty head wound that killed him.