Phil carefully inspects the area with Riaghan as Atraith stands guard. The signs indicate a burrowing creature came up from below and snatched each corpse - either one creature or two separate occurrences of the same creature. The prints around the site are familiar, and Philemon recognises them as similar to the tracks that you had been following south yesterday (the tracks of whatever had snatched the farmers).

Riaghan surveys the wider area and finds a section some 80 feet away where the burrowing creature came to the surface and seems to have then carried/ dragged its prize further. Sure enough the signs of passage converge with those from yesterday, leading south towards the forested hills over which rain clouds are starting to gather.

Artaith stands guard, keenly watching the surrounding fields and copses for any danger. Nothing flashes danger while her companions are investigating, but no sooner have they finished she hears a loud splashing and bellowing from back by the river...

...the curious among you approach the sounds, and from behind a thicket you observe a large, violently ugly humanoid splashing about in the water. It wipes lank hair and pond weed from it's face, clearly having stumbled and fallen into the muck while fishing. Bellowing angrily the armoured brute stabs down with its spear, flicking a large eel to the bank before raising a heavy boot and brining it down heavily on the writhing snack, chuckling and muttering to itself.

Spoiler: knowledge & info
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It's an ogre, but I don't believe any of you have the skills to ID it

It has not seen you. You have a surprise action if you wish.