Originally Posted by elemenoP
Harry Potter and the Philosopher's Stone was originally published by Bloomsbury. Although as I understand it, the manuscript was rejected by many publishers before that, so your intent if not your facts are correct.
If I understand correctly (and I may be mistaken) she did an initial private print run of 200 copies, and it was only after that that Bloosmbury took it on.
EDIT: A little reading shows that I'm wrong - Bloomsbury were indeed the initial publisher, printing 1000 copies (which are now worth a great deal of money). Thank you for the correction.