Solitude Is the School of Genius
psychologytoday.com
psychologytoday.com
One example, Darwin. The time delay publishing "On the Origin Of The Species", 20 years was broken by a letter from Alfred Russel Wallace who came to similar conclusions. This spurred Darwin to publish his findings. [0]
[0] "Charles Darwin: Evolution and the story of our species" http://www.bbc.co.uk/timelines/zq8gcdm