But here arose a difficulty on which he doubtless counted.

But now arose a difficulty which had not previously occurred to us: Who was to make it?

But now arose a difficulty, ludicrous in its cause, but which threatened to be serious in its effects.

But there arose a difficulty.

But now arose a difficulty.

And at the last moment there arose a difficulty in raising the requisite number of knives, forks, spoons, and plates.