Glyph group numbering

31. October 2025 · Write a comment · Categories: Item A, Item B, Item C, Item D, Item E, Item F, Item G, Item H, New Features

In Horley’s seminal work (Horley, 2021) he introduces a way of referring unambiguously to locations on the tablets. He assigns each group of ligatured glyphs a number, ascending in the order of the writing direction. Recognizing a ligatured group should be fairly straightforward, even for the uninitiated. There are some tricky points however.

For one thing, some glyphs are still recognized as single glyphs, even though they consist of two isolated parts. For instance, glyph 017 consists of two isolated parts placed vertically, 053 consists of three lines, and 025 consists of two curved boxes which are sometimes drawn touching, but not always.

For another, Horley is very careful to distinguish instances of touching glyphs from those that are not, and numbers the groups accordingly. This happens even in cases where the touching or non-touching seems likely to be coincidental. This can also mean that he assigns separate numbers to glyphs that are drawn as linked by Barthel and/or Fischer, but where he determines that the linking is not present. Anyhow the numbers shown refer to the numbers in Horley’s work, regardless of the way they are shown by Barthel and Fischer. For this reason too, there will be skipped numbers, whenever Horley recognizes some glyph that the others did not see. And in a few cases Barthel, or more likely Fischer, sees a glyph that Horley does not recognize. Such glyph groups go un-numbered.

At the same time I am also bringing the numbering of tablet sides in line with Horley’s work. Horley provides evidence for renaming the sides of some of the tablet after providing arguments for determining which side is front (“recto”) and which should be the back (“verso”), Among the tablets that have so far been updated are the following:

  • A: Tahua is changed from a/b to r/v
  • B: Aruku-Kurenga is changed from r/v to a/b
  • C: Mamari is changed from a/b to r/v
  • D: Échancrée; as mentioned previously, the lines of side B are renumbered in opposite order, i.e., 1–6 becomes 6–1
  • Tablets E–H have also received glyph group numbers, but the side names stay the same

Change to Tablet D

22. October 2025 · Write a comment · Categories: Corrections, Item D

Those who pay attention to the history of these items should know, Tablet D “Échancrée” was the first tablet that came to the outside world’s attention. When Bishop Jaussen became aware of this he tried to ask the Easter Islanders on Tahiti at the time to read it for him. When a volunteer named Metoro stepped forward, he revealed that the correct reading order for the tablets was to start at the edge closest to the reader, or the “bottom”, if one is treating the tablet like a page.

And generally researchers have taken great care to obey this order, and the lines in all of the corpus have been numbered in this fashion. However for tablets with even numbers of lines it can be quite tricky to determine which way is the “bottom”. And yet once this has been decided for the first side, the “bottom” edge for the second side will be the one closest to the “top” of the first.

Which makes it curious that Barthel did not observe the rule for this tablet. Horley reminds us of this fact and his work corrects the oversight. I am now following this, and have now corrected it in the corpus as well. So please be warned that the lines of Side b have now been renumbered, with Line 6 becoming Line 1, Line 5 becoming Line 2, and so forth.

Tablet display

24. October 2014 · 1 comment · Categories: Experiments, Item D, Item F, Item H, Item M, Item T

I am adding another form of display. This tries to show the lines as they appear on the tablets, that is “bottom up” and reversed boustrophedon. The display is always as a single tablet side, with little to no space between lines. The purpose is to get a better idea of the general aspect of the tablet.

Please note that I say “try”. The way the lines are displayed is less then perfect, since the line graphics for a single tablet are often of uneven length. One reason for this is of course that the lines are sometimes of very different lengths. But other times this seems to be because the glyphs have been “normalized”, i.e, glyphs which are actually of uneven size are drawn to appear the same size. Because of this, this form of display does not faithfully render glyph adjacency on neighboring lines. The display is auto-generated, and all lines are centered, so in particular short lines can be very far from there correct location.

Considering these problems one might wonder: ‘Why bother?’. Despite the shortcomings I believe that this form of display is helpful. For one it is a reminder of how the lines are arrayed on the tablets. Also for some tablets it actually makes things clearer. This is most obvious with Items that are heavily damaged. For items M and T, Barthel’s graphics show the lines at roughly the same length, with the damaged sections indicated. Placing the lines next to each other gives a general impression of where the legible sections are located on the tablets. This is also the case for item H, where the damaged section covers several lines. On Item D the gash between lines 5 and 6 on side a, which gives the tablet its name (l’Échancrée), becomes clearly visible. Item F’s near circular shape—it is presumably a small shard of an originally larger item—becomes apparent.

A few items (O, V, J, L, X), where I found this form of display to be unhelpful, have been left out.

New display pages

26. June 2012 · 1 comment · Categories: Barthel, Fischer, Item A, Item B, Item D, Tablets

http://kohaumotu.org/Rongorongo/svg/index.html

It seems I keep putting up more versions of the same thing. But here now finally are pages which use the svg images to display the tablets together with their codes. So far Items A, B, and D for both Barthel and Fischer tracings have been completed.

On these pages, the glyphs are individualized and clickable. Hovering over a glyph will hilite it in cyan. Lines are displayed to show glyph subdivisions, except in the case of stacked glyphs. So far the codes are still the original codes of Barthel/CEIPP. Missing codes are indicated with “_”.

However it should be noted that the “traditional” order of glyphs has been changed. As has long been known, stacked glyphs should be read bottom to top. Nevertheless the numbering given by Barthel (and CEIPP) has always given the codes top_glyph:bottom_glyph. For example the third glyph group on Tahua, side a, line 2 was written as 103a:095bjt. This has now been changed. If the codes are selected and copied, it will be noted that the order has been reversed. This will become more apparent as further interfaces are put up.

Better organization of the welter of pages now on this site still awaits.

Tablet D added

12. June 2012 · Write a comment · Categories: Barthel, Item D

For D: