[Manichean]

Generally, you need to identify the whitespaces and the variable parts. Thus, the page number

<hr>
<A name=8></a><i>8 </i><br>
<i>Highland Fling </i><br>

is removed by the expression

<hr>\s+<A\s+name=\d+></a><i>\d+\s+</i><br>\s+<i>Highland\s+Fling\s+</i><br>

and the authors name

<hr>
<A name=9></a><i>Betina Krahn </i><br>
<i>9 </i><br>

is removed by

<hr>\s+<A\s+name=\d+></a><i>Betina\s+Krahn\s+</i><br>\s+<i>\d+\s+</i><br>

I'll just let this stand as is, since you have read the manual entries already. If you are unclear on any special point in the expressions, feel free to ask.