It may be because this is one of the earlier Holmes tales that it deviates so interestingly from the pattern of solution that later came to dominate these stories. This story strikingly resembles its great predecessor, Edgar Allan Poe’s “The Purloined Letter,” in which Auguste Dupin determines the hiding place of a woman who is apparently of the French royal family and then recovers a letter being used to blackmail her. Like Dupin in “The Murders in the Rue Morgue,” Holmes surprises his friend early in the story with an accurate account of Watson’s recent activities based on details about the condition of his shoes.
In order to be certain of showing that it was a matter of new elements, the Curies would have to produce them in demonstrable amounts, determine their atomic weight and preferably isolate them. To do so, the Curies would need tons of the costly pitchblende. However, it was known that at the Joachimsthal mine in Bohemia large slag-heaps had been left in the surrounding forests. Marie considered that radium ought to be left in the residue. A sample was sent to them from Bohemia and the slag was found to be even more active than the original mineral. Several tons of pitchblende was later put at their disposal through the good offices of the Austrian Academy of Sciences.
Searches of the ABC's TARA Online television database  and the collection database of the National Film & Sound Archive  (conducted 4 Mar 2009) failed to return any results for these programs. Regrettably, many videotaped ABC programs, series (such as Certain Women ) and program segments from the late 1960s and early 1970s, were subsequently erased as part of an ill-considered economy drive. Although the recent closure of ABC Sydney's Gore Hill studios uncovered considerable quantities of film and video footage long thought to have been lost (such as the complete The Aunty Jack Show ), the absence of any reference on the TARA or NFSA databases and the paucity of citations elsewhere (. IMDb) suggest that the master recordings of the adaptations of the Norman Lindsay novels may no longer exist. The first broadcasts of these programs also predated widespread domestic ownership of videocassette recorders in Australia, so it is unlikely that any domestically recorded off-air copies exist either.