3. These are the 8 stars in the 12th hour according to my astronomy book (and none of them are in the southern hemisphere):

Alkes

α Crateris 4.08 18° 02′ S 10h 57m 166.6 574.6

Merak

β Ursa Majoris 2.34 56° 39′ N 10h 59m 167.2 575.2

The 12th hour:

Dubhe

α Ursa Majoris 1.81 62° 01′ N 11h 01m 167.7 575.7

Zosma

δ Leonis 2.56 20° 48′ N 11h 11m 170.2 578.2

Coxa

θ Leonis 3.33 15° 42′ N 11h 12m 170.4 578.4

Alula Australe

ξ Ursa Majoris 3.79 31° 49′ N 11h 16m 171.5 579.5

Alula Boreale

ν Ursa Majoris 3.49 33° 22′ N 11h 16m

Denebola

β Leonis 2.14 14° 51′ N 11h 47m 179.3 587.3

Alaraph

β Virginis 3.59 02° 03′ N 11h 48m 179.6 587.6

Phekda

γ Ursa Majoris 2.41 53° 58′ N 11h 51m 180.3 588.3

Looking towards west at 9 p.m. in November 14 in the year 1870 (the date I earlier used for descending Leo) we would from Hanga Roa have been able to see Crater:

Alkes (α Crateris) is here not drawn as a star of Hydra. Above is Corvus and at bottom right is the end triangle of Leo, composed by Denebola (β), Zosma (δ), and Coxa (θ). Between Crater and the Leo triangle is the beginning of Virgo, with Alaraph as β.

The four great stars in Ursa Major are outside the picture to the right.

In the upper left corner we can see the Southern Cross and between it and Hydra is a part of Centaurus.

Connecting stars with glyphs:

period 13
Ga4-16 (100) Ga4-17 Ga4-18 Ga4-19 (**75)
 ν Hydrae (164.1)     Alkes (166.6), Merak (167.2)
period 14
Ga4-20 (*168) Ga4-21 Ga4-22
Dubhe (167.7)    Zosma (170.2), Coxa (170.4)
period 15
Ga4-23 Ga4-24 Ga4-25 Ga4-26 Ga4-27 (111)
Alula (171.5)      
period 16
Ga5-1 Ga5-2 Ga5-3 (114)
period 17
Ga5-4 Ga5-5 (*180)
Denebola (179.3) Alaraph (197.6), Phekda (180.3)
Ga5-6 Ga5-7 (**90) Ga5-8 Ga5-9 (120)