As you can see, I leave "Among the Yew" with 3 exits
and go to "Among the Yew" with 4 exits and leaving
it in all directions does not lead to 3-exit room. I am also
reasonably confident that it cannot be reached any other way.
Looked for it for a hour or more.

Through Brush and Branches
  A deep melancholy envelops this wood in the form of shadow. 
Dense 
humidity chokes the air as the forest closes in around you. 
Though the 
shadow dominates, light has begun to pour through holes in the
canopy 
above. Large shrubs and foliage have grown past your knees,
entangling 
your legs and making passage difficult.  Catching your feet
with every 
step, the soft sound of snapping green is all you can hear
aside from 
the distant mourning of the wind and the low anguished groans
of the 
reddish giants about you.
 
[Exits: north]

<1022hp 1395m 505mv 22700tnl 5 AM outdoor wilderness
standing> s
Among the Yew
  A deep melancholy envelops this wood in the form of shadow. 
Dense 
humidity chokes the air as the forest closes in around you. 
Only a dim 
light ekes through the thick canopy far above.  Bare tangled
branches 
hinder your movement, surrounding you in a thick briar of dead
wood. 
Snapping like brittle bones with your passage, they are all
you hear 
aside from the distant mourning of the wind and the low
anguished 
groans of the reddish giants about you.
 
[Exits: east south west]

<1022hp 1395m 551mv 22700tnl 5 AM outdoor wilderness
standing> exa e
Hills rise up before you, leading toward a copse of
Bristlecone Pine.

<1022hp 1395m 551mv 22700tnl 5 AM outdoor wilderness
standing> exa w
The forest continues.

<1022hp 1395m 551mv 22700tnl 5 AM outdoor wilderness
standing> exa s
Yew give way to Banyan as the forest continues.

<1022hp 1395m 551mv 22700tnl 5 AM outdoor wilderness
standing> who gruop
That's not a valid race.

<1022hp 1395m 551mv 22700tnl 5 AM outdoor wilderness
standing> exa e
Hills rise up before you, leading toward a copse of
Bristlecone Pine.

<1022hp 1395m 551mv 22700tnl 5 AM outdoor wilderness
standing> exa w
The forest continues.

<1022hp 1395m 551mv 22700tnl 5 AM outdoor wilderness
standing> w
Among the Yew
  A deep melancholy envelops this wood in the form of shadow. 
Dense 
humidity chokes the air as the forest closes in around you. 
Only a dim 
light ekes through the thick canopy far above.  Bare tangled
branches 
hinder your movement, surrounding you in a thick briar of dead
wood. 
Snapping like brittle bones with your passage, they are all
you hear 
aside from the distant mourning of the wind and the low
anguished 
groans of the reddish giants about you.
 
[Exits: north east south west]
     A single copper coin.
A gnarled old tree stands here proudly.

<1022hp 1395m 546mv 22700tnl 6 AM outdoor wilderness
standing> exa e
Hills rise up before you, leading toward a copse of
Bristlecone Pine.

<1022hp 1395m 597mv 22700tnl 6 AM outdoor wilderness
standing> exa w
The forest continues.

<1022hp 1395m 597mv 22700tnl 6 AM outdoor wilderness
standing> exa n
The forest continues.

<1022hp 1395m 597mv 22700tnl 6 AM outdoor wilderness
standing> drop 1 copper
OK.

<1022hp 1395m 597mv 22700tnl 6 AM outdoor wilderness
standing> drop 1 copper
OK.

<1022hp 1395m 597mv 22700tnl 6 AM outdoor wilderness
standing> e
Among the Bristlecone
  Thousands of yellow-green needles poke and prod as you pass
through this 
grove of pine.  Angular light-brown limbs protrude from giant
twisted 
trunks, hindering your passage.  Though shielded from the
fierce wind, 
you can clearly see the taller boughs bending to its might. 
Your focus 
quickly returns to the rocky terrain about you as loose stones
and 
slippery brown moss make for a difficult climb.  Harsh hollow
whistles 
pierce the air as straining limbs groan in protest, the din
growing with 
each treacherous step.  Thinning to the east, the open air
beckons you 
from the relative safety of this sheltered copse.
 
[Exits: north east south west]
     A single copper coin.
A wolf sniffs the air.
A forest circles everything near.
A majestic pine stands here.

<1022hp 1395m 592mv 22700tnl 6 AM outdoor wilderness
standing> w
Among the Yew
  A deep melancholy envelops this wood in the form of shadow. 
Dense 
humidity chokes the air as the forest closes in around you. 
Only a dim 
light ekes through the thick canopy far above.  Bare tangled
branches 
hinder your movement, surrounding you in a thick briar of dead
wood. 
Snapping like brittle bones with your passage, they are all
you hear 
aside from the distant mourning of the wind and the low
anguished 
groans of the reddish giants about you.
 
[Exits: north east south west]
     A pile of copper coins.
A gnarled old tree stands here proudly.

<1022hp 1395m 587mv 22700tnl 6 AM outdoor wilderness
standing> n
Among the Yew
  A deep melancholy envelops this wood in the form of shadow. 
Dense 
humidity chokes the air as the forest closes in around you. 
Only a dim 
light ekes through the thick canopy far above.  Bare tangled
branches 
hinder your movement, surrounding you in a thick briar of dead
wood. 
Snapping like brittle bones with your passage, they are all
you hear 
aside from the distant mourning of the wind and the low
anguished 
groans of the reddish giants about you.
 
[Exits: north east south west]
     A turbid puddle has formed here at the base of a tree.
A gnarled old tree stands here proudly.

<1022hp 1395m 582mv 22700tnl 6 AM outdoor wilderness
standing> exa s
The forest continues.

<1022hp 1395m 582mv 22700tnl 6 AM outdoor wilderness
standing> s
Among the Yew
  A deep melancholy envelops this wood in the form of shadow. 
Dense 
humidity chokes the air as the forest closes in around you. 
Only a dim 
light ekes through the thick canopy far above.  Bare tangled
branches 
hinder your movement, surrounding you in a thick briar of dead
wood. 
Snapping like brittle bones with your passage, they are all
you hear 
aside from the distant mourning of the wind and the low
anguished 
groans of the reddish giants about you.
 
[Exits: north east south west]
     A pile of copper coins.
A gnarled old tree stands here proudly.

<1022hp 1395m 577mv 22700tnl 6 AM outdoor wilderness
standing> w
Among the Yew
  A deep melancholy envelops this wood in the form of shadow. 
Dense 
humidity chokes the air as the forest closes in around you. 
Only a dim 
light ekes through the thick canopy far above.  Bare tangled
branches 
hinder your movement, surrounding you in a thick briar of dead
wood. 
Snapping like brittle bones with your passage, they are all
you hear 
aside from the distant mourning of the wind and the low
anguished 
groans of the reddish giants about you.
 
[Exits: north east south west]
     A single copper coin.
(Burning) A haggard man limps here.

<1022hp 1395m 572mv 22700tnl 7 AM outdoor wilderness
standing> e
Among the Yew
  A deep melancholy envelops this wood in the form of shadow. 
Dense 
humidity chokes the air as the forest closes in around you. 
Only a dim 
light ekes through the thick canopy far above.  Bare tangled
branches 
hinder your movement, surrounding you in a thick briar of dead
wood. 
Snapping like brittle bones with your passage, they are all
you hear 
aside from the distant mourning of the wind and the low
anguished 
groans of the reddish giants about you.
 
[Exits: north east south west]
     A pile of copper coins.
A gnarled old tree stands here proudly.

<1022hp 1395m 567mv 22700tnl 7 AM outdoor wilderness
standing> s
Among the Yew
  A deep melancholy envelops this wood in the form of shadow. 
Dense 
humidity chokes the air as the forest closes in around you. 
Only a dim 
light ekes through the thick canopy far above.  Bare tangled
branches 
hinder your movement, surrounding you in a thick briar of dead
wood. 
Snapping like brittle bones with your passage, they are all
you hear 
aside from the distant mourning of the wind and the low
anguished 
groans of the reddish giants about you.
 
[Exits: north east south west]
     A single copper coin.

<1022hp 1395m 562mv 22700tnl 7 AM outdoor wilderness
standing> 

Autosaving.

<1022hp 1395m 613mv 22700tnl 7 AM outdoor wilderness
standing> n
Among the Yew
  A deep melancholy envelops this wood in the form of shadow. 
Dense 
humidity chokes the air as the forest closes in around you. 
Only a dim 
light ekes through the thick canopy far above.  Bare tangled
branches 
hinder your movement, surrounding you in a thick briar of dead
wood. 
Snapping like brittle bones with your passage, they are all
you hear 
aside from the distant mourning of the wind and the low
anguished 
groans of the reddish giants about you.
 
[Exits: north east south west]
     A pile of copper coins.
A gnarled old tree stands here proudly.