Not I

The Sack Full of Newes. An Old Jest-Book, ed. J.O. Halliwell (London: For the Editor, 1861), pp. 38-39:

There was a Lady dwelt in the Countrey which had a foole that did use to go with her to church: and on a time as his lady sat in the church she let a great fart escape so that all the people heard it, and they looked on the foole that stood by her, thinking that it was he: Which when the fool perceived, he said truely it was not I that let the fart, it was my Lady. Whereat she was ashamed, and went out of the church, and chid the foole because he said it was not himselfe. Then the foole ran into the church againe and said aloud, masters, the fart which my Lady let I will take it upon me for she commanded me to say so. Whereat all the people laughed more then they did before, and the Lady was much more ashamed.