And in doing this I advise you to send to the best manors of your lands those of your household in whom you place most confidence to be present in August at the leading of the corn, and to guard it as aforesaid.

This part of optics, when well understood, shows us how we may make things a very long distance off appear as if placed very close, and large near things appear very small, and how we may make small things placed at a distance appear any size we want, so that it may be possible for us to read the smallest letters at incredible distances, or to count sand, or seed, or any sort or minute objects.

And in doing this I advise you to send to the best manors of your lands those of your household in whom you place most confidence to be present in August at the leading of the corn, and to guard it as aforesaid.

Command those that govern your house before all you household that they keep careful watch that all your household, within and without, be faithful, painstaking, chaste, clean, honest and profitable.

If you know how many acres you have sown of each kind of corn, inquire how much the acre the soil of that land takes for sowing, and count the number of quarters of seed, and you shall know the return of seed, and what ought to be over.

Command that no one be received, or kept to be of your household indoors or without, if one has not reasonable belief of them that they are faithful, discreet, and painstaking in the office for which they are received, and withal honest and of good manners.

Command that your marshal be careful to be present over the household, and especially in the hall, to keep the household, within doors and without, respectable, without dispute or noise, or bad words.