With Sheratan and Polaris at Cb1-1 and Rigel at Cb3-1 one might suspect some other bright star should be at Cb2-1. However, from Cb1-1 (day 107, April 17) to Cb3-1 (day 158, June 7) there are 50 days, which points at a correspondence with the position of Algenib Persei (50.0) and so far we have not perceived any similar correspondence related to Cb2-1.

Both Algenib Persei and Rigel could have been regarded as stars which brought 'fire' (rima, light) - 'luci-fers':

Sheratan	April 17	0h
Rigel	April 17 + 50	Algenib Persei (50.0)

The last of these 49 glyphs corresponded to the heliacal rising of Haedus I and at the other side of the 'gate of the goat' (Haedus I + II) was the beginning of line Cb3, which in rongorongo times coincided with right ascension 5 (rima) hours:

	4. Rohini
Sheratan 11	12	13	14
May 27	28 (148)	29	30

Cb2-17	Cb2-18	Cb2-19	Cb2-20
manu rere - toga	manu	toga	ka tuu te toga o te manu
no star listed	Aldebaran (68.2), Theemin (68.5)	no stars listed
November 27	28 (332)	29	30
Syrma 12	13 (196)	Az Zubana 1	2
τ Scorpii (250.7), Han (251.0)	ζ Herculis (252.1), η Herculis (252.5)	no star listed	Wei, η Arae (254.3)

Pleione 1 (15)	2	3
May 31 (151)	June 1	2

Cb2-21	Cb2-22	Cb2-23
kua tapu - no te manu	ku kikiu - i te henua	koia ra
no stars listed
December 1	2 (336)	3
Az Zubana 3	4 (200)	5
Denebakrab (254.7), ι Ophiuchi (255.3), Grafias (255.4)	κ Ophiuchi (256.2)	Cujam (256.9)

Pleione 4	5 (19)
June 3	4 (155)

Cb2-24	Cb2-25
tagata tua ivi - te henua	tagata tua ivi - ki te henua
Hassaleh (73.6)	Almaaz (74.7), Haedus I (74.8)
December 4	5
Az Zubana 6	7
no star listed	17h (258.7)
no star listed	no star listed

At May 31 (Pleione 1) Metoro said kua tapu - no te manu. This was the 3rd night of 5 with no stars (at least according to my list).

Tapu

Holy, sacred, forbidden, taboo, off-limits; to declare holy, forbidden, taboo, off-limits. he-tapu te pera, to declare a burial ground taboo. Taputapu, to pace up and down. Vanaga.

To forbid, to prohibit, sacred, holy. Hakatapu, to forbid, to prohibit, to make holy, to consecrate. P Pau.: tapu, to swear; fakatapu, to give sanction to. Mgv., Mq., Ta.: tapu, sacred, holy, forbidden, prohibited. Tapua, holy. Churchill.

Just, only, merely, still; ka-oho-nó, just go! e-tahi nó i-ora-ai, only one survived; e-haúru-nó-á, he is still sleeping; e-aga nó, he just works (i.e. he always works). Vanaga.

1. Of (na); no te mea, because (of the thing); no te ragi, celestial (of the sky); no ira, wherefore (of that). 2. Intensive; hakapee no kai hoao, abundance; riva no iti, convalescence; haga no iti, to plot mischief; hare itiiti no, hut; no mai, intensive, spontaneously; tuhi no mai, to accuse; hiri tahaga no mai, to go on without stopping; topa tahaga no mai, wholly unexpected. 3. Exclusive, unique, that and naught else; gutu no, vain words; noho no, stay-at-home, apathy. Churchill.

Possibly he meant this night was sacred because of the presence of some effigy (statue, manu).

Nowhere else in his readings did Metoro use the word tapu. Therefore his tapu should here be a Sign.

"The days set aside for religious rites so rigorously observed in Hawaain life - the tapu days of Ku, Hua, Kane, and Kanaloa - depended solely on the phases of the Moon.

Malo states that the tapu days were observed only during eight months of the year, the remaining four being devoted to the Makahiki or new year ceremonies extending from Ikuwa, October, to Ka'ulua, February.

From the significant statement that the priests were blindfolded during the five intercalary days which completed the year, it may be inferred that the Hawaiians distinguished between a civil reckoning based on Sun and stars and a religious calendar founded on the phases of the Moon." (Makemson)

No stars during 5 nights could motivate blindfolding the priests for 5 days. What happens above should be reflected down on earth in order to keep cosmos in order. Maybe also all the cooking fires were stamped out.