You kill the goblin with your two lance strikes.

Alton will peek out from his hiding place and aim at the third goblin. Due to having taken the Hide action, he should have advantage and sneak attack.

To Hit with Shortbow: 17 Damage with Sneak Attack: 12

After his attack, he will shuffle over to be behind Symon to help obscure himself.

You kill the third goblin,  

 Llew_Llaw is next,

 than PrimalBlade,

 than Krivoi_Rog

Dale moves up to Darius, and the first group of Goblins (one of which is deceased)

Attack with his Battle Axe: Attack: 19 Damage: 12

"Filthy Goblin!"

That is another goblin dead, wow.

(so, three down, one gobbo left?

Yes

Gimbel runs toward the goblin and swings his mace at the final goblin.

Mace - 

Attack: 16 Damage: 5

Krivio_Rog, it’s your turn,

Symon looks to where the last goblin stands, raises his hands and starts weaving a pattern with his fingers (just a little sort of twitch that takes almost no time) and says in a gutteral tone, "Lakmius Telum hielos! Ignit!" And a bolt of flame jets away from his right pointing finger.

Attack: 16 Damage: 9

In one fell swoop, all the goblins are dead. Everyone gets 40 EXP. 

"Any livin' folk who ain't slimey goblins, ye kin come out now," Symon says in a bold voice,  Looking at those who are close to the horses, "Any sigh o' life up there?  Durnan!  Sildar!" He calls out as he moves carefully up to where the cart and dead horses are. 

"Foully met, Gnome, 'tis unfortune that brings you here, yes?  I, am Symon Twist, Wizard," he says to Gimbel Murnig, as if this were the most important thing to know at this moment.  "Ye be seein' a couple of folk round here, mayhaps battlin' these scum?"  He wave vaguely in the direction of the various goblin corpses.

All the while he is keeping an eye out for other 'scum' and, hopefully, survivors.

Darius, for his part, set right to looting the goblin bodies. Truth be told, he didn't expect them to have much... but as the saying went, a copper looted is a copper earned.

(( If needed, Investigation Check: 4 ))

The only thing you find on the goblin's corpses is 5 arrows.

Dale starts looking around for a path "while this is a good hide these goblins didn't live here, and what I know of goblins is that they like to stay closish to their cave"

Investigation 5

You can't find anything but dense trees and thickets.

"Feh! Didn't think these things would be worth our time!"

Darius stood, disappointed, but his mind already turning to other matters. "No sign of Gurden or Sildar? Well, that's just great," he grumbled. "C'MON, ALTON! Looks like we've got some tracking to do!"

(( Knowing Alton's a rogue, Darius would figure he's likely their best at tracking. Darius isn't that bad himself though. Survival Check to look for tracks: 8 ))

You find some tracks that lead to a hidden pathway blocked by a fallen tree. 

Alton cracks his knuckles as he puts his bow away and hops down, moving up to the fallen tree by Darius. He kneels down, just to make sure that he is reasonably confident the tracks do in fact lead to this tree...

Survival for tracking: 13

The tracks do lead there, but a better inspection reveals that tracks has been on this path for a long time, with many goblins coming a going.