"That drink last night has addled my poor head sadly". Who is the speaker?

Rip Van Winkle is the speaker. He has just awoken from his very long sleep..... and he both recognizes and doesn't recognize the landscape around him.

The very village was altered; it was larger and more populous. There were rows of houses which he had never seen before, and those which had been his familiar haunts had disappeared. Strange names were over the doors - strange faces at the windows - every thing was strange. His mind now misgave him; he began to doubt whether both he and the world around him were not bewitched. Surely this was his native village, which he had left but the day before. There stood the Kaatskill mountains - there ran the silver Hudson at a distance - there was every hill and dale precisely as it had always been - Rip was sorely perplexed - "That flagon last night," thought he, "has addled my poor head sadly!"