J.K. Rowling, the creator of Harry Potter, has joined the battle to keep Scotland in the United Kingdom, donating $1.6 million to the cause and writing a lengthy plea on her Web site for votes against Scottish independence.

Rowling, who was born in England but has lived in Scotland for 21 years, said that “if the majority of people in Scotland want independence I truly hope that it is a resounding success.

“While a few of our fiercer nationalists might like to drive me forcibly over the border after reading this, I’d prefer to stay and contribute to a country that has given me more than I can easily express.”

Scotland will vote in a hotly contested referendum on Sept. 18 whether to separate from Britain and seek its own path as a separate nation.

The latest poll, by TNS, shows that 42 percent plan to vote to remain in the U.K., with 30 percent supporting independence and 28 percent undecided. The 12 percentage-point gap was unchanged from the month before.

Rowling said she believed that both Scotland, and what would be left of the United Kingdom, would suffer economically from a separation, but that Scotland, with declining oil reserves, would probably suffer more.

She reminded voters in Scotland that when RBS (the Royal Bank of Scotland) had to be “bailed out, membership of the union saved us from economic catastrophe and I worry about whether North Sea oil can, as we are told by the ‘Yes’ campaign, sustain and even improve Scotland’s standard of living.”

Rowling wrote:

I … know that there is a fringe of nationalists who like to demonise anyone who is not blindly and unquestionably pro-independence and I suspect, notwithstanding the fact that I’ve lived in Scotland for twenty-one years and plan to remain here for the rest of my life, that they might judge me ‘insufficiently Scottish’ to have a valid view.
It is true that I was born in the West Country and grew up on the Welsh border and while I have Scottish blood on my mother’s side, I also have English, French and Flemish ancestry.
However, when people try to make this debate about the purity of your lineage, things start getting a little Death Eaterish for my taste.  By residence, marriage, and out of gratitude for what this country has given me, my allegiance is wholly to Scotland and it is in that spirit that I have been listening to the months of arguments and counter-arguments.
…. I’ve heard it said that ‘we’ve got to leave, because they’ll punish us if we don’t’, but my guess is that if we vote to stay, we will be in the heady position of the spouse who looked like walking out, but decided to give things one last go.
….If we leave, though, there will be no going back. This separation will not be quick and clean: it will take microsurgery to disentangle three centuries of close interdependence, after which we will have to deal with three bitter neighbours. I doubt that an independent Scotland will be able to bank on its ex-partners’ fond memories of the old relationship once we’ve left. The rest of the UK will have had no say in the biggest change to the Union in centuries, but will suffer the economic consequences.