Google Books and Internet Archive are amazing resources. 17th, 18th and 19th Century books that once took years to find, and that cost far too much for most seminarians and pastors, are now available in PDF format for free. Among the multitude of volumes you want to download (in addition to all the commentaries Spurgeon recommends in Commenting and Commentaries) are the following 19th Century gems:
Sermons of Moses Hoge (Hoge was one of the key influential figures on Archibald Alexander, first Professor at Princeton Seminary. This particular copy happened to be Samuel Miller’s. Miller was the second Professor at Princeton Seminary.)
Sermons and Essays by the Tennents (Sermons and Essays by various figures associated with the Log College)
Samuel Davies Sermons vol. 1 (Martin Lloyd-Jones once said that Davies was the greatest preacher in American history)
Samuel Davies Sermons vol. 2
Samuel Davies Sermons vol. 3
The link for volume 1 of Samuel Davies Sermons actually links to Volume 2. The correct link is: http://books.google.com/books?id=09ITAAAAYAAJ&printsec=frontcover&dq=editions:0pUc6yu_l10agA
Link correction: Samuel Davies Volume 1 http://tinyurl.com/myyydj
Thanks for the post!
Many or most of the commentaries recommended by Spurgeon can be read online via the Book Academy:
http://www.book-academy.co.uk/