More on mezuzot and the entrances that need a mezuzah. What about a sidepost that doesn't need a mezuzah? Plus, how the mezuzah goes up on the right side. Also, tefillin! 4 passages in 4 sections of the tefillin boxes. Plus, the lettering of tefillin, and how all letters must be present, and not connect (as script connects). Plus, the derivation of "totafot" as indicating the 4 segments of tefillin.