When I find something unusual in the old newspapers I do a bit of research about it with the help of the interweb. Usually there are more interesting things to be found. Trying to research the Linguin was very annoying. There are any amount of linguini recipes floating about in the ether and the computer insisted on steering me in that direction. I wanted half-snake half-crocodile stories, not pasta recipes!!! Aaaarrrgh!
In the end, after much searching, the only monster-related Linguin I could find was in direct reference to this story from 1899 (if you find more, please let me know!). Does that mean it was such a rare and elusive creature it has only been seen once by outsiders?!!! What a discovery!!! (Apology for over-use of exclamation marks.)
Hmmm. Could Lieutenant-Colonel Andrew Haggard been duped by his friend Baron Alfons Pereira? Surely not.