Tuan: the gua poem or judgment or "to expel evil spirits"

Old character (sealscript)

Tuan, the judgment of the hexagrams, is a picture of a pig. Or that is what we are told. It is also part of the name of hex.33, withdrawing. In 33 the pig has to do with sacrificing. When one withdraws, one sacrifices all those nice things of the world 'out there'. But one also gets rid of everything which keeps one from being oneself.

The traditional character, still used in Taiwan.

The old oracle bone character does look like a pig - with some imagination. But for those who have experience with pigs, it does show one. Screaming, wriggling, big ears, and the one at right with a big belly or maybe many nipples.

The judgment is not just a description of the workings of a hexagram, it is the incantation which belongs to the moment of a hexagram. When you want to solve a situation like hex.47, you need a different invocation than in a situation like hex.11. A different 'hex'...

Judgment of 11: Mount Tai: small proceeds, great comes up. Auspicious. Expansion. 
And judgment of 47: Confined, expansion - determination. Great people auspicious. No fault. Words are not believed.

In hex.11 an expectation of better times coming along. No further specific advice.
In hex.47 advice to divine and to act on what the spirits tell you, and to look for great people, and also a warning that words will not be believed.

See Harmen's text about tuan.

Hex.28 and hex.4 Ridgepoles and rocks

Hexagram 28 has this character: the ridgepole:

 In the fanyao of line 3 one finds the masonry-lined well and in the one of line 4 stone. 
The fanyao of line 3 is 47.3. There you find a rock or stone: the character is a picture of a rock falling from a ledge.
And in the fanyao of line 4, in 48.4, this character: “brick wall of a well”. Top left in the character the picture of fire. Top right probably straw, bottom unknown to me.

Hexagram 47 is the upside-down (Pang tong gua) of hexagram 48, and 47.4 corresponds to 48.3.

Hexagram 28 does not visibly change when you turn it upside-down. Or does it???
Maybe the sagging ridgepole of line 3 corresponds upside-down with the eminent ridgepole of line 4.

The Mirrors 28.3, 28.4, 47.3 and 48.4 are all four together one 'unit'. Mirrors and reflections of each other. Every mirror has a 'theme', something which connects all four. In this Mirror the theme has to do with the strength of stone and poles/ treetrunks. Organic and inorganic strength.