Hi Glen,
I had this happen to me too, but found it in the apache archives at http://archive.apache.org/dist/lucene/solr/4.3.1/solr-4.3.1.tgz
Phil Sager
Ohio Historical Society
800 E 17th Ave
Columbus, OH 43081
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From: Data, API, website, and code of the Chronicling America website [mailto:[log in to unmask]] On Behalf Of Glenn Bunton
Sent: Tuesday, September 03, 2013 12:29 PM
To: [log in to unmask]
Subject: Re: ChronAm 3.9.0

Just tried this command from the install_ubuntu.md instructions
wget http://apache.mirrors.lucidnetworks.net/lucene/solr/4.3.1/solr-4.3.1.tgz
This is what I get back

wget http://apache.mirrors.lucidnetworks.net/lucene/solr/4.3.1/solr-4.3.1.tgz
--2013-09-03 12:26:53--  http://apache.mirrors.lucidnetworks.net/lucene/solr/4.3.1/solr-4.3.1.tgz
Resolving apache.mirrors.lucidnetworks.net (apache.mirrors.lucidnetworks.net)...
Connecting to apache.mirrors.lucidnetworks.net (apache.mirrors.lucidnetworks.net)||:80... connected.
HTTP request sent, awaiting response... 404 Not Found
2013-09-03 12:26:53 ERROR 404: Not Found.

From: David Brunton <[log in to unmask]>
To: [log in to unmask]
Sent: Wednesday, July 31, 2013 11:01 AM
Subject: ChronAm 3.9.0

Hi all,

We tagged v3.9.0 yesterday, and it's available in the usual spot:

Among other things, we've put quite a bit of work into the install instructions, added a few features, made some dependency upgrades, and fixed a bunch of bugs: https://github.com/LibraryOfCongress/chronam/blob/master/CHANGELOG.md

The release has also gone live at http://chroniclingamerica.loc.gov, for those who would like to see it in action (using the Library of Congress branded skin).

All the best to those of you who are new committers, new users, and newly on this mailing list- it's gaining a real sense of momentum now.