The irony of his choosing to make the quest at all did not escape him.

The irony of the situation did not escape the elf.

The irony of his position did not escape him.

The irony of that escapes you for the moment, but I will point it out later.

The irony of the situation might have escaped him, however.

The irony of my withdrawn presence did not escape me.

The irony of his career does not escape him.

The great irony hadn't escaped Alex: she was more like her father than he ever might have guessed.

And for a moment the irony of the observation escaped her.

It was a wedding ring pattern, the irony of which had not escaped him.