Hi Folks!
Since we are mentioning about the Lamkin books [which I highly recomend]and since this has gone into a thread about delayed sword's attack, let's discuss this briefly...
Delayed Sword is designed to address the the simplest basic attack a beginner would deal with for it's time frame. a front right hand lapel grab. The concept that a grab [not immediately followed by a punch or subsaquent action] is designed to "control and restrain" a person rather than do them harm. the response to this attack teaches us the basic concept of "When someone grabs you

in or regrab." The idea was to use a pinning check to temporarily trap the offending hand [because you don't want him to rip your expensive shirt] and as you step back [or a "step through reverse" {a term coined by Mr. Parker after he saw himself moving backwards on film}] to 6 o'clock into a right neutral bow, which "establishes a base" and also pulls your opponent off balance, teaching you that "Always keep your opponent off balance while you should always be ON Balance!".
This was common when predominently male students were training, but as more women entered the studio, it was difficult to tell a female white belt student that her first technique involved placing your hand on her chest [breasts] via her gi top lapel. So, the technique attack was changed to an "Attempted front right hand lapel grab" and the student found it easier to see the possibility of a push [attempted or completed] or right straight punch off the same linear action. The pinning check was replaced with a left positional check as solar plexus level.
In the early kenpo days, There was no check on delayed sword. The opponent was expected to maintain the grab as you stepped back [after all, that's why he grabbed you in the first place!] and the retreating foot manuver extended or hyper extended the right arm and then you used a right hammering inward "striking block" to knock his offending hand away and open up his centerline for the subbiquent groin kick.
If you look at Larry Tatum's version of the journal, he advises the inward block to the right bicep, because if you have done the left pinning check and done the extending action, you can safely break the kenpo law of "when blocking to the inside of an arm, block below the elbow,not above it" because you've pinned the limb and the "blocking strike" will cause his hand to open and the grab will be released.
I hope that I was of some service,
KENPOJOE