the functionality is not. 
There are several times when the author has used this construct in practice. 
Regardless, there is little reason to deny the <code>let</code> form access to
all the features of lambda functionality.

<H2>Symbols in Binding Sections</H2>

Both the features above rely upon the placement of symbols in <code>let</code>
binding lists (this statement is intentially simplistic).  The only
other apparent use of such symbol placement is to tersely bind variables
to unspecified values.  For