Since you ask, the following are, so far as I can tell, not available via your links:

George Eyre-Todd
George Paton
John Glen
Peter Buchan
Robert W. Douglas
John Stuart Blackie
Mary Carlyle Aitken (the link above doesn't work, incidentally; there needs to be a J on the end of the URL)
Alfred Mason Williams (there is a link, but it is to JSTOR, which is available to subscribing institutions and their affiliates only)
Joseph Edwards Carpenter
John Ross
Robert Ford
William Harvey
Walter Jenkinson Kaye
James Grant Wilson
George Farquhar Graham
Sarah Tytler
Universal Songster


'Snippet View' is just that; a few small samples of bits of some pages. Not of any real use, so not indicated above.

Though not linked to from Google, the Buchan is available at the Internet Archive: http://www.archive.org/details/ancientballadsan02buchuoft

Others of the above may be also, but I haven't time to check at the moment.

Of course, I may be missing something at Google. Please let us know if that's the case, and I'm wrong about some or all of this.