Hi Sylvia
You wrote:
"It doesn't seem to be possible to search on Ancestry with the piece and folio number any more, which was always useful if you suspected a mistranscription, especially for the IOM where you could make use of Brian Lawson's census index. "
Try this: look near the top right of the ancestry search screen for the tiny words "go to old search", and if you click on this, it transports you back to the good old search methods. I always use this "piece and folio" method of locating an IOM page, in conjunction with Brian Lawson's indices --- it saves so much time and avoids frustration!
Jean C