Economics in Don Quixote, Part 1 (the "precautionary motive" for demanding money)

I just started reading the famous book by Cervantes. I don't know how many parts I will end up with but I will post excerpts from the book related to economics from time to time if I see more of them as I read.

This excerpt is from THE HISTORY OF DON QUIXOTE, Vol. I, Part 1. (CHAPTER III. WHEREIN IS RELATED THE DROLL WAY IN WHICH DON QUIXOTE HAD HIMSELF DUBBED A KNIGHT):

"He [landlord of the inn that Don Quixote wanted to stay at] asked if he had any money with him, to which Don Quixote replied that he had not a farthing, as in the histories of knights-errant he had never read of any of them carrying any. On this point the landlord told him he was mistaken; for, though not recorded in the histories, because in the author's opinion there was no need to mention anything so obvious and necessary as money and clean shirts, it was not to be supposed therefore that they did not carry them, and he might regard it as certain and established that all knights-errant (about whom there were so many full and unimpeachable books) carried well-furnished purses in case of emergency, and likewise carried shirts and a little box of ointment to cure the wounds they received. For in those plains and deserts where they engaged in combat and came out wounded, it was not always that there was some one to cure them, unless indeed they had for a friend some sage magician to succour them at once by fetching through the air upon a cloud some damsel or dwarf with a vial of water of such virtue that by tasting one drop of it they were cured of their hurts and wounds in an instant and left as sound as if they had not received any damage whatever. But in case this should not occur, the knights of old took care to see that their squires were provided with money and other requisites [for emergencies], such as lint and ointments for healing purposes; and when it happened that knights had no squires (which was rarely and seldom the case) they themselves carried everything in cunning saddle-bags that were hardly seen on the horse's croup, as if it were something else of more importance, because, unless for some such reason, carrying saddle-bags was not very favourably regarded among knights-errant. He therefore advised him (and, as his godson so soon to be, he might even command him) never from that time forth to travel without money and the usual requirements, and he would find the advantage of them when he least expected it."

This all sounds like what in economics we call the "precautionary motive" for demanding money. Money demand is defined as what portion of your wealth you wish to hold as cash. Probably in the case of Don Quixote, it would be coins. But both coins and cash are a widely acceptable medium of exchange. Although, Don Quixote was simply leaving his money at home. So it might be a bit different. 

Perhaps we could say that money you carry as you travel is different than money you leave at home for safe keeping. They are two different forms of wealth in that the level of security differs.