Metrics provide more evidence
Earlier observations which are supported by the preceding images include:
We examined all parts of the inscription with optivisors and a boom-supported stereomicroscope. For the purpose of this report, the “first part” of the inscription refers to the strokes making up the word “MARIAME,” and the “second part” of the inscription refers to the strokes constituting the words “KAI MARA.”
1.2.1 General characteristics of incisions.
The incisions in the chalk surface were distinguished by width, depth, the steepness of the sides of the trough and the form of the bottom. All strokes that make up the letters in the inscription share some similarities, which would suggest that a similar tool, with a bifurcated tip, was used throughout. A double groove appears in strokes that slope to the right, while strokes that are vertical or slope leftward have a “V”-shaped trough. From the discernible angle of execution of the various strokes, it is apparent that both parts of the inscription were made by right-handed writers. However, the similarities end there.
1.2.2 Unique characteristics of incisions.
Most of the strokes that make up the name MARIAME are comparatively shallow compared with those of the second part of the inscription. According to preliminary measurements, the width of the points of the instruments used to inscribe the first and the second parts of the inscriptions is different. Comparing similar strokes from all parts of the inscription, the strokes from the first part were consistently 80% to 90% narrower than those of the remainder of the inscription, whether the instrument was fully depressed or not. Troughs at the bottoms of the strokes were also distinguishable between the two parts. These measurements made it apparent that similar but clearly distinct tools had been used in the writing of the first and the last parts of the inscription. The drooping line that rides below the inscription is consistent with the strokes made by the second instrument."
Add to this, the maximum width of the tip from point to point of the bifurcated tip for the second part of the inscription is 1.o mm. The maximum width of the second is approximately .85 mm.
Apparently two separate tools were used to inscribe the two parts of the inscription.