It may be sourced but ... 

Sources have to reflect the weight and relevance of a particular fact.  Verne is primarily remembered as a Science Fiction writer.  How much of the 'sources' actually mention pederasty?  There appears to be no concrete proof of this - so is it right to possibly slander a dead person, given that, if the same allegations were made today they would be 'libellous and baseless allegations' or something similar?  Shouldn't the section be cut down at least?