Well, the Doctor clearly does not understand her thinking, "Doctor, one important thing about the moral high ground is that it cannot be held if one is dead. We do not know for certain if the city is completely uninhabited."

She picks up another sword, this one smaller, and though not quite as finely balanced as the first one, it is far more suitable for her to carry, and the grip is a better size for her hand. Grabbing her own bundle of thick rope, she unrolls it on a table and uses the sword to cut a length. Using the sword to cut through (it is duller than she would like, but that is convenient, considering how she is planning to carry it). She ties a knot under the guard, and then uses the knot as a little bit of leverage to keep it slightly away from her body, and then ties the rope around her waist.

The Doctor may have found whatever he wants, but so has Morgana.