The Hunting of the Snark the illustrations needed three months to be complete. By the time Holiday had completed the sketches and sent them to Carroll, Carroll had already created a new fit requiring an illustration. They worked this way until Holiday had created nine illustrations as well as the front cover and the back cover of the book. Thus, among the ten illustrations shown below, one illustration is not by Henry Holiday. The "Ocean Chart" is typographic art whereas electrotypes made from Joseph Swain's woodblock engravings were used to print Henry Holiday's illustrations. There is no depiction of the Snark, nor of Boots. However,
Carroll diagram as any number or object has to either have an attribute or not have it. Carroll diagrams are often learnt by schoolchildren, but they can also be used outside the field of education, since they are a tidy way of categorising and displaying information. Carroll diagram A Carroll diagram, Lewis Carroll's square, biliteral diagram or a "two-way table" is a diagram used for grouping things in a yes/no fashion. Numbers or objects are either categorised as 'x' (having an attribute x) or 'not x' (not having an attribute 'x'). They are named after Lewis Carroll, the pseudonym of Charles Lutwidge