I appears these are the images:
http://archive.org/details/mcguffeysseconde00mcgu
There are a number of McGuffey Readers in the catalog:
+---------+---------------------------------------------------+
| etextid | title |
+---------+---------------------------------------------------+
| 14668 | McGuffey's Second Eclectic Reader |
| 14640 | McGuffey's First Eclectic Reader, Revised Edition |
| 14766 | McGuffey's Third Eclectic Reader |
| 16751 | McGuffey's Sixth Eclectic Reader |
| 1490 | The New McGuffey Fourth Reader |
| 15040 | McGuffey's Fifth Eclectic Reader |
| 15577 | A History of the McGuffey Readers |
| 1489 | The New McGuffey First Reader |
| 14642 | McGuffey's Eclectic Primer, Revised Edition |
| 14880 | McGuffey's Fourth Eclectic Reader |
| 15456 | McGuffey's Eclectic Spelling Book |
+---------+---------------------------------------------------+
Here is a PG project that needs some formatting help.
The HTML conversion would probably best be termed "fail".
Yet it should be a simple case.
How would you want proofers to submit it after "matching the scan"?
What would you consider to be a properly marked up copy in
the format of your choice? How should it get there from the previous
step?
http://www.gutenberg.org/cache/epub/14668/pg14668.html