How to undelete a document via the List webservice

Question

Hello all,

I have deleted a file via the List webservice by calling UpdateListItems with the XML:

            <Method ID="1" Cmd="Delete">
                <Field Name="ID"></Field>
                <Field Name="FileRef"></Field>
            </Method>

My question is: How can I undelete a file via the List web service? I am using Sharepoint 3?