When I was working at the City hospital in the 70's, several of us in the laboratory got to talking about the song and we couldn't agree on the lyrics. Back in those old days you could call the Detroit Public Library 'hotline' and ask a question. So, we called and asked if they knew the lyrics (a good example of how we got by before the Internet). Sure enough, the answer was given.
I have a particular fondness for 'the partridge in the pear tree'. I have a lovely pillow with the image on it. I have various holiday ornaments depicting it. And last year, Hallmark started a collection of ornaments celebrating the song, so I have purchased those too.