Toward it, perforce, we trudged.

Its brilliancy grew greater.
A few paces away from it we stopped.

The yellow luminescence streamed through a slit not more than a foot wide in the wall.

We were in a cul-de-sac for the opening was not wide enough for either Drake or me to push through.

Through it with the light gushed the curious heat enveloping us.
Drake walked to the opening, peered through.