I'm also confused by this. They don't specify whether they accept attachments or not... Also, Query Tracker lists a "submissions" email address, but the agency's website doesn't. It just says to direct your query to your agent of choice.
I have to confess I'm a little stumped as well. In the absence of a direct endorsement of attachments, I always err on the side of pasting into the e-mail...but doing that with a full seems ridiculous.
I also wish the agent bios were a little more clear in terms of what they are actually seeking, in terms of submissions. A brief sampling of authors they already represent is valuable, but it tells us nothing about what else they would like to see - and "general fiction" is a rather broad category.