190 Correspondence—Percy F. Kendall. 
I now come to what strikes me as a matter of great gravity. In 
my previous communication I uttered a protest against a small 
portion of a map in W. B. Wright’s Quaternary Ice Age, being 
enlarged up to the full breadth of a quarto page, and pointed out 
that the enlargement had been so badly done by the artist (a 
charitable assumption) that though the arrows indicating the ice- 
flow are stated to be “‘ added from the map by Mr. Wright’’, some 
had been “‘ swung round through angles of 20-40 degrees”’, Judge 
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of my surprise to learn that the whole work was deliberately done 
by Professor Gregory himself. He says: ‘‘Hleven out of the thirteen 
lines follow the originals precisely ; the two easternmost are rather 
generalized to show the movement east of Lough Ree, and trend 
rather farther to the west than the nearest corresponding of 
Mr. Wright’s lines.” 
May I be permitted again to use the obnoxious word “ mistake ”’ ? 
Professor Gregory is mistaken, wholly mistaken, in supposing that 
only two of the lines were ‘rather generalized”. Every 
