Main Bath....

The main bath is in the center of the house.  Similar to the Master Bath there is no source of natural light.

If there ever was a candidate for a Sun Tunnel or full skylight, this room is it!!

The tub and toilet share the same wall as the master bath with both facilities exactly flip opposite of the master.  The kitchen is behind the side wall of both bathtubs. 

This is pretty much the view if you are standing in the hallway looking into the batch.  Not sure I'd want to be standing there drying off with the door open.

 

It's twin 1969 vintage sink is in the Master Bath!

This used to be a clothes hamper of some type with the door flap laying on the ground.  It's accessible from the Master Bedroom closet but if you look at the back side of that wall (next pic), it used to be a narrow door sized opening that was fully trimmed out.

I don't see any signs of shelving so it might have been a smaller step in linen closet with no door and the shelves were there where the non-paneled wall is.  I think they took down the wall between the two closets to increase the size of the Master Bedroom closet.

 The way to freedom and light!