A Most Telling Question: Why could Darwin never say where his Eureka! moment came from?
The answer is because he admitted it came from his slow and gradual realisation form the reading the literature. And that literature was written by those who had pre-1858 (many pre 1844) read and cited Patrick Matthew's original and complete hypothesis of natural selection.
The time has come for us to get out of the 155 year old 'state of denial' of the terrible, yet significant and obvious, real facts that are right under our noses
Don't be a Darwin dupe: Read and weigh for yourself the independently verifiable facts (here).