Lyre complies with Maglath's ordering, rapidly tying the goblin up. He switches his usual tittering to one with a more repetitive melody to focus on the task at hand.

Lyre then turns to the party, reflecting Maglath's words. "Glasstaff's Laboratory? Or his personal room? Past the meeting room?" He reflects, asking which direction they should head in.

A quick summary since it's been a while:

The party has entered the Redbrand Hideout. After clearing out an initial sentry and dealing with the nothic in the crevasse, they've managed to rescue the imprisoned family of the woodworker Thel Drendar, who informed them of a valuable family heirloom located in Thundertree. They crossed over to the other side of the crevasse and defeated a group of bugbears, capturing one of the goblins. Meanwhile, a group of Redbrands seems to be gambling nearby...

The goblin cries out before Lyre ties him up, "Wait! Let me come with you, I can-"

He's mouth is muffled by the gag, as he looks onto Maglath with wild eyes. 

There's a sound of clattering dice behind the door across the hallway, followed by a gabble of voices and betting. What does the party do?

Maglath looks down at the goblin and sighs. 

"He may be useful," he says as he reaches down and lifts the goblin up with one hand.

He looks over at the others.

"Let's leave the gamblers for later and find the way around and to Glastaff's laboratory. If we can catch the wizard by surprise we might be able to shut this place down for good."

He then looks out the door of the room they're in and towards the area with the crevasse. If it's clear he will start that way, keeping away from the gambler's door.

Murmen grunts in faint agreement, following Maglath.

Lyre chitters a reflection of Maglath’s words, agreeing with the thought. He will be a good Rogue and scout ahead a feet or few, picking any locks if needed

The goblin seems quite distressed as Maglath lifts him with one hand, but upon seeing no harm will befell him, quickly quiets down. 

Lyre scouts ahead, noticing another hallway leading from the crevasse area. The hallway goes down a similar set of steps and again has two doors on the left and right sides. The sounds of the gamblers can still be heard from the left door- the party has indeed bypassed the room. However, this time the door is left slight ajar, offering a potential view inside at the risk of exposure. 

(Perception check to listen to sounds from the right door.) 

Lyre quiets his incessant chittering to listen!

Perception: 20

Maglath holds back to let Lyre listen at the door with as much quiet. He also signals to the goblin to keep quiet, indicating the slightly open door, putting a finger to his lips, and drawing it the across his neck.

Murmen hefts his axe with a significant look at the goblin, and tries not to jingle too loudly.

Lyre hears a faint bubbling and dripping noise from within the door on the right. 

From the inside the room with the gamblers, the gabble of voices stop as one single gruff voice speaks. "Let's make this toast to Glasstaff. Phandalin will be ours by the morning!"

There's a cheer followed by the clanking of mugs. 

Maglath watches Lyre listen at the quiet door. But at the sounds of cheering from the other room, he takes a step closer to that door, ready to yank it closed to give Lyre time to finish investigating the door he's listening at.

Lyre chitters a muted recording of what he overheard to the party. It seems like some sort of waterway. A river, maybe? Underwater cavern? That wouldn't help bring them to Glasstaff, and taking a dive certainly wouldn't help his crossbow function appropriately. He nods to Maglath and Murmen and inclines his head towards the active room. It appeared Glasstaff may be inside. Storming in and killing as many as possible before they realized it may be a good idea, albeit a risky one. Lyre remembers the exact inflections of the words; it would be compelling evidence to prove their actions.

Maglath listens to the bubbling and dripping noise the Lyre mimics.

“Cooking pots maybe,” he says.

Then he nods at Lyre’s gesture to the noisy room with the gamblers. 

“Sounds like they’ve been drinking. This may be the best time to take them,” he whispers.

He puts the goblin down, swings his shield around and draws the Longsword, Talon.

He waits for the others to get ready and if they do, he kicks open the door and rushes inside.

Murmen grunts.

"Could be risky.  We don’t know how many are in there, and we’re already a wee bit roughed up."

(Sniped.)

Maglath nods to Murmen.

”We’re not far from the entrance we came through. We could go outside and rest a moment before continuing.”

The party exits the Redbrand's hideout, returning back out the tunnel from whence they've came. Night's already fallen, with bright stars in the clear sky. The party rests in the moonlight by the white tree.

Murmen extends his power out towards the longsword Talon. He realizes that the sword is indeed of an exquisite design, imbued with a magical power that enhances the accuracy and lethality of the weapon. (+1 longsword)

Half-way through their rest, there's some distant yelling from down the tunnel. It quiets down eventually, but from the sound of it a lot of people are moving around inside the Hideout. The sound of a wood saw and hammers can be heard inside as well. What does the party do? 

Murmen hands the sword back to Maglath.

"Sharp.  Magically sharp.  Should cut a little better than whatever else ye may have."

He jerks his head towards the noise.

"Should we check it out?"

(1 HD during short rest: 6  )

Maglath nods his thanks to Murmen, and runs his hand down the blade of the sword. The sound of construction inside brings him back to their situation.

"I gather they've noticed someone has been inside," Maglath says. "They will be on guard, but they may be on edge as well and make mistakes."

He looks over at Lyre.

"Are you up to going a head and scouting out what awaits us?"

Lyre, being mostly uninjured, spent the time watching the proceedings and ensuring the party wouldn't be noticed. At Maglath's words, he cranes a head- "Scouting out. Up to going ahead," he reflects. The Kenku slings on his armor. Scouting was a risky mission, and as always, he leaves with some hesitation, attempting to scout out the tunnel by instinctively blending into the shadows of the cavern.

Stealth: 24
Perception: 9

Lyre creeps through the shadows down the tunnel, where the sounds of activity get louder and louder. But before he arrives at the entrance near the cave, a few bulls-eye lanterns light up the tunnel, preventing further passage.

He catches a glimpse of a newly-erected makeshift fortification: simply a wall of barrels nailed together with gaps in between for archers. He catches the a few glints of metal in the gaps- crossbows by the look of it. Lyre hears a lot of cursing, a little crying, and a few oaths of revenge. 

One conversation stands out to him, as he hears Elsa's familiar voice.

"Glasstaff, you shouldn't stay here! The culprits are clearly after you, and we can't risk you getting hurt!"

A confident, commanding voice of a man replies. 

"Nonsense. I'm not going to abandon this post. The Redbrands will have their revenge for what has happened, mark my words."

There's a small cheer, and the sound of construction continues.