Record keeping using small clay ‘tokens’ was present in the Near Eastern Neolithic in the tenth millennium bc, these objects widespread and abundant by the sixth millennium bc, and by the fourth millennium bc it is clear they were functioning, perhaps as generalized elements for simple counting tasks recording time, resources and the like, albeit among other functions that did not have a mnemonic function (Bennison-Chapman Reference Bennison-Chapman2018, 240).

The sequences of dots/lines associated with animal images certainly meet the criteria for representing numbers: they are usually organized in registers that are horizontal relative to the image with which they appear to be associated, and are of regular (rather than random) size and spacing, akin to the notion of a Mental Number Line being central to the development of mathematical abilities (Brannon Reference Brannon2006; Dehaene et al. Reference Dehaene, Bossini and Giraux1993; Pinel et al. Reference Pinel, Piazza, Le Bihan and Dehaene2004; Previtali et al. Reference Previtali, Rinaldi and Girelli2011; Tang et al. Reference Tang, Ward and Butterworth2008).

"it's not the amount of speakers that will save us"

The first rule of Isotype is that greater quantities are not represented by an enlarged pictogram but by a greater number of the same-sized pictogram.

Ancient peoples frequently engaged in offloading their mental contents and augmenting their brainpower with external resources, as evidenced by objects they left behind. Sumerians employed clay tokens to keep track of livestock and other goods when trading; Incas tied knots in long cords, called quipus, to memorialize events; administrators and merchants across a broad swath of the ancient world used abacuses and counting boards.

Later in the thread just cited, John Meador quoted another text, 1594, attesting to something more astounding: ...two especial uses, I have often exercised this art for the better help of my own memory, and the same as yet has never failed me. Although I have heard some of Master Dickson, his schollers, that have prooved such cunning Cardplayers hereby, that they could tell the course of all the Cards and what every gamester had in his hand. So ready we are to turn an honest and commendable invention into craft and cousenage." -Hugh Platt: The Jewell House of Art and Nature 1594 This art, or at least its claims, goes somewhat beyond remembering what cards have been played: they actually can use it to know what the other players have in their hand, before playing the cards. Platt considers this a kind of cheating (usually "cozenage", from "cozen", first use 1573, probably from the Italian cozzone, horse trader, per http://www.merriam-webster.com/dictionary/cozen).

In his play Il Candelaio he mentions the tarot: an innkeeper asks a scoundrel in his establishment if he likes to play tarot; the scoundrel replies ”A questo maldetto gioco non posso vincere, per che ho una pessima memoria”. (“At this cursed game I cannot win, because I have a terrible memory”)