The Modern Forgery Hypothesis

[asteckley]

IIRC, the letter was supposedly written by Marci's secretary, at a time when his eyesight was failing and he could no longer write by himself.  

This supposition can --rather conveniently-- explain almost any suspicious aspect of the letter, including the pantographic accuracy of the signature that Rich has observed.  

Is there any evidence for the idea of a secretary penning the letter?
We can be confident of Marci's age at the time ... but that explanation of the letter's anomalies is completely circumstantial. I'm curious as to what the evidence is that his sight was failing to that extent, and that he had ceased to write his own letters? Or that an assistant was involved in his letter writing by that time?

--A