Final answer:
The letters are described as ordinary and clearly directed, given the skilled and deliberate penmanship revealed in the referenced library fragment that emphasizes regularity and precision.
Step-by-step explanation:
The passage, particularly the reference to the penmanship in the fragment from The Morgan Library, indicates that the characteristics describing the letters align most closely with the first description: ordinary and clearly directed. The mention of the regularity and precision in the scribes' work points towards a style that is methodical and straightforward. The scribes' intent to produce a unified finished product by imitating a single style further supports the idea of ordinary and clearly directed letters.
The use of terms like "regular hand" and "imitated a single style" implies a deliberate and focused approach to the creation of these letters. The scribes seem to adhere to a specific, standardized form, enhancing the clarity and legibility of the script. The choice to imitate a single style suggests a unified and intentional effort rather than a spontaneous or haphazard approach.
In contrast to descriptions that might connote ambiguity or complexity, such as illegible, mysterious, or flaunting, the emphasis on regularity and imitation of a single style aligns more with the notion of ordinary and clearly directed letters. This suggests that the primary goal of the scribes was to produce a cohesive and easily understandable written product, reflecting a disciplined and intentional execution rather than deviating towards more intricate or enigmatic styles.