Part 1: Goblin Arrows

The 3/4 cover Severus is in has saved him from taking a particularly nasty hit from the goblin's arrow.

Round 2 ends, and Round 3 begins. The goblin's hide attempt failed this time, but he is still taking advantage of 3/4 from the bushes he's in. Turn order is as follows:
Turn order is as follows:
-->1. Alstaer (Undamaged with 8HP)
2. Severus (Undamaged with 14HP)
3. Quinny (Moderately wounded with 12/15HP)
4. Osvaldo (Critically wounded with 1/12HP)
5. Goblin 2

For the record, I don't believe anyone has any healing spells in this party. There's always the option of taking a short rest, since I don't recall Osvaldo doing that yet. Taking a short rest will allow you to heal 1 Hit Die of damage. If you've already used up your Hit Dice on short rests, you may have to take a long rest and get some Hit Dice back.

What are Severus and Alstaer doing now that the immediate threat of goblins has been taken care of?

@therescuant: It's mid-summer in the northern hemisphere, so the sun sets pretty late this time of year. Around 9pm, or a little after.

Osvaldo, if you would like to use this short rest to heal back some Hit Points, go ahead and make a roll according to your Hit Die.

@Everyone: To regain Hit Points during a Short Rest, a PC needs to take 10 minutes actively resting. The player may then roll as many Hit Dice as they wish, not to exceed the total unused Hit Dice the PC has based on their level, and add the result to the PC's current Hit Points. Remember to add your Constitution Modifier to your Hit Dice roll when adding Hit Points to you current total! Once your Hit Die has been used up, it is gone until the PC takes a Long Rest (a period of 8 hours "resting" with at least 6 hours spent actually sleeping). Hit Dice are then replaced at a rate of 1/2 (round up) the used-up Hit Dice per long rest. All PCs start with 1 Hit Die at Level 1, and gain another Hit Die at each level earned. Your Hit Die depends on your class. Rangers' Hit Dice are d10s. Barbarians' Hit Dice are d12. Rogues' Hit Dice are d8, and d6 for Sorcerers. When using Hit Dice to gain current Hit Points during a short rest you do not have to declare how many Hit Dice you want to roll ahead pf time. You can roll 1 Hit Die at a time and stop when you're satisfied with the number of Hit Points you've gained back. You may never exceed your Maximum Hit Points when using Short Rests to regain Hit Points.

For example, Severus is a Level 3 Barbarian. He will have 3d12 Hit Dice to pull from when he needs to regain Hit Points after combat.
After a particularly ugly encounter with a Bugbear he takes 15HP damage, and after combat is over he decides he needs to take a short rest and heal. While resting he rolls 1d12 and gets a "2", healing 4 Hit Points ("2" plus his Con Modifier pf +2) and now has 2d12 left in his pool. Not satisfied with that he uses another of his Hit Dice, rolling an "11" (=2 Con Modifier =13). This actually takes him to a total of 17HP healed, but may not exceed his Maximum Hit Points so Severus is fully healed, and the extra 2 Hit Points are just scratched and ignored. Severus still has 1d12 Hit Dice to pull from in the future if he needs another short rest. Later that evening the party tales a Long Rest, and Severus gets half (rounded up) his used Hit Dice back. Since he used 2 Hit Dice, he will get 1 back, and will start his day with a total of 2d12 Hit Dice to use.

Let me know if you have any questions on how healing while resting works.

Per PHB, looks like I also keep my 5 temp hit points till they're depleted or I take a long rest. The Tireless ability has no set duration.

@ctme2000: Ah, okay... Good catch. So I had you losing 4 HP in the first ambush on this post, and another 7HP damage during the surprise round against the goblin guards in this post. That left Osvaldo with 1HP left. Having healed back 12HP with your Tireless Feat, you should now have 13HP (1 temporary HP). Is that what you have as well?