I love giant armadillos, one of the many many animals on my want-to-see-in-the-wild list. I'm sure this or another London Zoo giant armadillo ties in with Gerald Durrell (or maybe David Attenborough, seeing they were both collecting animals for British zoos at the same time; but I have "Zoo Quest To Guiana", and there's nothing about giant armadillos in there). Anyway, as I recall, Durrell was trying to catch a giant armadillo by special request of London Zoo but couldn't find any, and when he got back home discovered that by coincidence another collector had managed to catch one for the Zoo instead. For some reason I always assumed the one in the 1968 zoo book to be this individual, but I just checked the dates of Durrell's expeditions and they were in 1950 to British Guiana ("Three Singles To Adventure"), 1953-54 to Argentina and Paraguay ("The Drunken Forest") and 1958 to Argentina ("The Whispering Land").