[texhax] vertical rule in left margin, attached to text

[Noble, Noelle]

I feel like this should be a simple task, but I am not finding the answer. I
need to selectively insert a vertical line in the left margin of an article
class document (for a PHS 398 resubmission -- vertical rules indicating
where text has changed). \marginpar doesn't seem to want me to use it for
this purpose, and I would prefer to not turn paragraphs into tabular
environments, it did not appear to me that fancyhdr includes anything for
the left vertical margins, so I confess defeat and turn to the list.

This is an example of what I would need:

|    Reno Dakota there's not an iota of kindness in you 
| You know you enthrall me and yet you don't call me 
| It's making me blue 
| Pantone 292 Reno Dakota 
| I'm reaching my quota of tears for the year 
  Alas and alack you just don't call me back 
  You have just disappeared 
  It makes me drink beer 
  I know you're a recluse You know that's no excuse 
| Reno that's just a ruse 
| Do not play fast and loose with my heart 
  Reno Dakota I'm no Nino Rota 
  I don't know the score 


Thanks in advance for any help.

Noelle Noble
Administrative Coordinator
Modeling and Methods Group
Fred Hutchinson Cancer Research Center
1100 Fairview Avenue North, MP-665
P.O. Box 19024
Seattle, Washington  98109-1024
voice:  (206) 667-4147
fax:  (206) 667-7004