The latter half of the nineteenth century marks an important period in the professionalization of telegraphic knowledge further establishing the distinction between science and technology as well incremental and theoretical research. Parameters were established as to how ‘Intelligence’ concerning the wires was to be gathered and distributed. This was no unanimous process, but invoked controversies between telegraph ‘engineers’ and ‘technicians’ as well as between the remote cable stations around the globe’s ‘peripheries’ and the cable companies’ headquarters in London. In 1879 for instance, Ezra Weedon, superintendent at the Heart’s Content submarine cable station broke loose an argument with Henry Weaver, managing director of the Anglo-American Telegraph Company in London suggesting ‘improvements’ to Joseph Stearn’s duplex set-up. This paper will use the controversies surrounding the growing distinction through professionalization between telegraph engineer and telegraph operator to show how telegraphy contributed to the increasing professionalization of scientific knowledge in the late nineteenth century.