使用R和XPath 1.0进行XML查询时，无法提取特定文本

Question

I would greatly appreciate guidance on how I can extract the four names of cities where this firm has offices. Firebug has the name greyed-out under cufontext, such as <cufontext>MEMPHIS</cufontext> and MEMPHIS is in grey. BTW, I don't mind getting some extraneous text back such as state or address. Three of my failed efforts are shown.

library(XML)

doc <- htmlTreeParse('http://www.lewisthomason.com/locations/', useInternal = TRUE, asText = TRUE)               
xpathSApply(doc, "//div[@id = 'the_content']", xmlValue, trim = TRUE)  # returns list()
xpathSApply(doc, "//div[@id = 'the_content']/div/h3//cufon", xmlValue, trim = TRUE) # returns NULL
xpathSApply(doc, "//div[@id = 'the_content']//cufon[@class = 'cufon cufon-canvas']", xmlValue, trim = TRUE)  # returns NULL

Thank you very much.

Answer 1

Turned out that the HTML source actually looks about like this (formatted & simplified) :

<div id="the_content">
    <div class="one_fourth">
        <h3>KNOXVILLE</h3>
        <p>One Centre Square, Fifth Floor<br>
        .....
    </div>
    ....
</div>

but browsers (tried using chrome and firefox) somehow transform it to a slightly different structure, while the parser doesn't do the transformation. This simpler XPath worked fine for me :

//div[@id = 'the_content']/div/h3