Fun fact: J M Barrie who wrote Peter Pan donated the copyright of both the book and play in perpetuity to Ormond Street children's hospital. It's been a significant source of funding for them over the years.
After seeing your comment I did a little googling, and fascinating to me is that a special law was passed in the UK specifically to make one of the Peter Pan copyrights held by Great Ormandy Street never expire: https://www.plagiarismtoday.com/2015/10/21/peter-pan-and-the...
TFA:
> Still, best estimates are that it’s not a hugely important part of the hospital’s budget.
which links to The Guardian [0]:
> The hospital has abided by Barrie's wishes expressed in his will and always kept the proceeds from Peter Pan a closely guarded secret. With copyright expiry looming, De Poortere is at pains to point out the revenues are "significant", but not as great as many suspect.
> "People who talk about millions a year have a strange idea of what a character is worth," she says. "On the whole, it's been significant but I wouldn't call it huge. I am on my own doing the Peter Pan administration, but I am part of a charity that has 100 people."
> If the newspapers of 1929 were right about proceeds of £2,000 a year, that would be £90,000 a year in today's money, according to the Office for National Statistics.
Just to expand ;)
[0]: https://www.theguardian.com/business/2007/dec/28/gtormondst