Declaration of the National Anti-Slavery Convention was written by William Lloyd Garrison for the formation of the American Anti-Slavery Society in December 1833. It was reprinted in The Liberator on December 14, 1833. It is now available in the Public Domain.
You can also use the Optimized PDF option to crank the size down in very targeted ways. Given the big before/after shift, the culprit is probably the image you're embedding. Try exporting that file in various formats (PDF, jpg, png) and then import it.
1. Re: How to change PDF document dimensions - Acrobat Pro 9. Bill@VT Aug 12, 2010 1:30 PM (in response to han_nah_sl) Not necessarily the best way to deal with the problem, but a simple way, is to print to a new PDF with the desired paper size selected and select shrink to fit page.