DWWW1: part 1.
Peter Rowland. It was - and we concluded that it, and another very obfuscated one, must come from the same origin. I said I'd keep an eye open, as I read a lot of Victorian periodicals. But once the puzzle was there, it was more than just keeping an eye open.
It took it around 20 minutes. I don't say this to be smug, but I can understand what William Gibson had in mind with the character Colin Laney in his novel Idoru: the intuition for finding stuff in vast amounts of mundane data. There were obvious things to look for - ["Lanoe Falconer" "portrait"] / ["Lanoe Falconer" "photograph"] and so on - but these ran off into hundreds of irrelevant hits (because her stories contain references to photographs and portraits).
I had a vibe instead to go to a proxy server (which gets post-1865 Google Books hits not normally accessible outside the USA) and try ["Lanoe Falconer" "severe"]. I have a theory that if a photo has some characteristic, an article relating to it will contain that concept, even if not directly commenting on the photo. This may be garbage - but it worked. Third hit down the list was 1892 issue of the Boston-based magazine The Writer. The proxy server linked through sufficiently to find the photo, and the excellent Hathi Trust site had a good-quality scan.
The photo comes from page 25, The Writer v.6 January 1892 - December 1893, Boston: The Writing Publishing Company (Hathi Trust link); it heads a short biographical sketch by TGL Hawker. Whoever prepared the above Picture Magazine image exaggerated the severity, making her look absolutely scary, rather than the reality: just pleasantly formal. It might be a pose; she did rather go for hiding her identity.