"The Wreck of a World" looks to have been republished as part of this series:
https://www.routledge.com/British-Future-Fiction-1700-1914-Volume-3/Clarke/p/book/9781138117440
Not an especially cheap option, though, even in ebook form.
"A Mexican Mystery" is even more elusive, although this gives me some hope despite the schedule looking to have slipped:
https://www.tim-taylor.com/news/posts/2025/07/11/a-quick-update-on-various-projects.html
I'm rather enjoying the hunt, mind you. When I first started reading scientific romance fiction it was quite hard to find anything other than the major and more mainstream works, such as H.G. Wells' stories. These days many previously exceptionally obscure books have been republished or converted into (often free) ebooks, so locating something can be as easy as going to Project Gutenberg or buying an anthology. Rarities like "A Mexican Mystery" stop me from growing complacent 😁
#ScientificRomance #Books #Fiction #ScienceFiction