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.
How to resize pages in a PDF file using Acrobat XI. Donna Baker â November 14, 2013. Open the document with pages you want to resize by cropping, and click the Page Thumbnails tab. Resize the panelâs width and thumbnail size as needed. To check a pageâs size, click the thumbnail to display the page.