In message , at 17:54:12 on Wed, 1 Nov 2017,
Peter Able remarked:

This is overt plagiarism.

"the practice of taking someone else's work or ideas and passing
them off as one's own" where 'draws on the pioneering information
design work of Harry Beck' comprehensively refutes that.

and who wrote that quotation?

David Rumsey's website..

Precisely.

Do you have any evidence the author was passing it off as their own?
--
Roland Perry