The following is an example of what I currently have:

\setcounter{secnumdepth}{3}

\chapter{The Chapter}

\section{First Section}
\subsection{First sub Section}
\subsubsection{First sub sub Section}

which renders something like this:

Chapter 1
The Chapter

1.1 First Section
1.1.1 First Sub Section
1.1.1.1 First sub sub Section

Now unfortunately in LaTeX, I can only go down to a subsubsection (1.1.1.1) but I need to be able to go down further...for example, something like this 1.1.2.1.3. Are there any commands that will allow me to do this?