You're an expert on the matter, as you should be.
Let me give you the long version.
Lemarians are basically the pony version of Atlantis. Very magical and advanced civilization, thousands of years ago.
Not too much is known about them. But you're an expert, so I'll tell you some stuff.
The Lemarians are the first real confirmed civilization to ever exist. There is no real proof of a civilizations before them, except for ye olde mythical tales of a civilization that fought Tirek together with the gods.
The Lemarian Empire stretched from the frozen North all the way down to Saddle-Arabia and parts of Trotantium. There are a few ruins still left in Equestria and to this day they still make for fascinating exploration. The cause of the downfall of the Lemarians is unclear, what is known is that a civil war broke out shortly before their eventual downfall. Causes of the war unknown.
That's already what a scholar would know, as an expert you also get this:
There is a distinctive difference between the northern ruins in Equestria and Trotantium and those here in Vilitus. While those north are richly adorned and very large, blending nature and magic, the ones here in Vilitus are very geometrical with lots of patterns of squares on the walls everywhere. There is a marked different philosophy of the Lemarians here and those up north visible in the architecture. Unfortunately, the one ruin you visited here in the city had no writing to speak of. It is said the ruins here are haunted by demons, but so far you've seen no trace of it.
The gods of the Lemarians are:
I think that serves as an introductory course.>>582393
"That's very good, we'll need it.">>582394Sliver>>582391
You look around, you see hoofprints in the blood, there were 3 equines here, one very big. They all seem to have left through the main door. The victim died because the attacker stabbed through the chest cracked the ribs and removed the heart, very probably with his own hoof.
From his clothing you can see that the victim was middle class, probably living in Snake or Arachnia. Hmm, the necklace he has is interesting, you take it, it is a circle with an arrow in it, this would probably suggest Arachnia, since occult insignia.
Furthermore, from a few drops on his sleeves you can see he visited an ice cream shop recently.>>582390
She looks at both of them.
"I'll be conducting this interview. Morning Dew, you seem alphabetically first, shall we begin?"