3. The picture of King Cepheus we just saw is from John Flamsteed's Atlas Coelestis (1729), while the earlier picture of the Southern Fish is from Johann Bode's Uranographia (1801). I have copied both pictures from http://www.ianridpath.com/startales/piscisaustrinus.htm.

The picture of Piscis Notius has Microscopium to the right and above is the Microsope Globius Aerostaticus - both creations of  modern minds, de Lacaílle respectively Lalande. Both were French astronomers and had the telescope. With their new instruments nothing of value could possibly be obtained by looking backwards, I imagine they thought, because Lalande placed his Telescopium too far away from Grus (the Crane) to be of any value for the 'astronomer':

"... Horapollo, the grammarian of Alexandria, about A.D. 400, tells us that the crane was the symbol of a star-observer in Egypt ..." (Allen)

These modern constellations are to the right in the picture, although they have lower right ascensions, and time therefore moves from right to left, just as in modern star charts. Modern minds have no regard for time.

After some initial mistakes we have arrived at a result where the Southern Fish (the old constellation) is at Gb2-16:

Al Nā'ir - α Gruis		68	'Fum al Hūt' - β Piscis Austrini
Gb2-16 (*336)	Gb2-17		Gb4-21 (342)	Gb4-22
72

4	Fomalhaut - α Piscis Austrini		9	Al Rāi' - γ Cephei
	Gb4-27	Gb4-28 (349)		Gb5-5 (359)	Gb5-6
16

The 'mouth of the fish' (Fum-al-Hūt) evidently has been moved 348.8 - 342.2 = 6.6 days at some time. Each day corresponds to ca 72 years, and 6.6 * 72 = 475 years.