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5. I decided to see if Allen's culmination dates follow a pattern or not. A quick search - using the search function in Microsoft Word (cfr the Introduction) - through all the pages written so far in this dictionary of signs gave the following culmination dates from Allen:

  Allen's date of culmination Right ascension
Menkar December 21 0

03h 00m

45.7

453.7

 0
Alcyone December 31 10

03h 45m

57.1

465.1

 11.4
Alnilam January 25 26

05h 34m

84.7

492.7

 39
Gienah May 10 105

12h 14m

186.1

594.1

 140.4

The culmination dates of Allen are not increasing with the increase in the right ascension days:

140.4 / 105 * 365¼ = 488

But there is a quite stable difference in the day numbers:

  Allen's date of culmination Date of heliacal rising
Menkar December 21 355

126

May 5

 229
Alcyone December 31 365

137

May 17

 228
Alnilam January 25 365 + 25 = 390

165

June 14

 225
Gienah May 10 365 + 130 = 495

266

September 23

 229

I have here not tried to consider the effects of precession from Allen's time to the time of my astronomy book.

To reach the culmination dates of Allen it seems we have to add around 7½ months (15 lunar stations) to the dates of heliacal rising.

There are 229 glyphs on side a of the G tablet and this fact tends to support the dates of Allen.