Raphael Tuck and Sons created a Shadowgraph series of cards many of which feature cats. Similar designs were used for the Halloween series. This card is postmarked 1910 and is in good condition. Interestingly the shadows of the cats don't match the sizes of the cats as they are drawn. This card is labelled no. 907 in the Shadowgraph Christmas series.
Cost $3 from a used book dealer, up to $20 online.

