1. One of the very first glyphs I thought I understood was koti. On the assumption that the glyph type really occurred in Friday - that what I saw was a calendar for the week (of which I was rather sure) - then what was depicted surely must be Venus as morning and evening star:

Pb10-52	Pb10-53	Pb10-54
Hb9-48	Hb9-49	Hb9-50

The parallel in H gave support, and the illustration there seemed to be even more convincing. In Hb9-50 we can see the two 'stars', while in Pb10-54 the form of the central 'gap' between the two parts of the orbit of Venus is in focus.

Mercury is similar to Venus in being invisible at times, below the horizon. And the occurrence of the same type of sign in Wednesday seemed to confirm my guess:

Pb10-42	Pb10-43	Pb10-44	Pb10-45
Hb9-33	Hb9-34	Hb9-35	Hb9-36	Hb9-37	Hb9-38

The disorder shown in Hb9-36 could be explained by the strangely non-regular orbit of Mercury as observed from Earth:

(Hamlet's Mill)