<HTML><FONT FACE=arial,helvetica><FONT SIZE=2>In the contexts in which I've heard, "It says here," used, "it" was not used
<BR>in a nonreferential sense; rather, it was a specific reference to an
<BR>unidentified source (one that the speaker may not have mentioned because
<BR>(s)he either knew the source and did not think it important to mention; was
<BR>not sure of the source; or, as Murie suggested, knew of no such source, but
<BR>wanted to lend credibility to his/her own opinion. It may indicate some
<BR>kind of progression from the double subject, "(In) the book, it says . . ."
<BR>to the personified (even passive/middle voice like?) subject, "The book
<BR>says," to cataphoric reference to "It says here in the book" to simple
<BR>pronoun substitute, "It says here. . . " It might also have to do with
<BR>topicalization.
<BR> P-A-T</FONT></HTML>