...Royal signatures

This insert from a Christmas card sent in 1939 by King George VI and Queen Elizabeth was rescued from a waste paper bin, hence the cigarette burn.

By legend, the card - of which the picture part is missing -  was sent to a close relative of Queen Elizabeth, the mother of our present Queen.

Then, as now, it was common for royal signatures to be done by an autopen machine, since so many royal signatures were required. And it is possible that the King's signature here was done in that manner. However, it is likely that the card was genuinely signed by Queen Elizabeth because she omitted the letter "R" for Regina from the end of her name, which you normally see on her autopen signature, and one would expect that a card sent to (say) a sister, aunt or cousin to be personally signed.

...a playful postcard

This postcard dated 1902 to a single lady has a message in backward writing and an inverted stamp. The positioning of a stamp on a postcard at this time often signified some friendly or romantic message, although sources differ somewhat as to the potential meanings.

http://www.philatelicdatabase.com/wp-content/uploads/2011/05/Language-of-Stamps.jpg

This card was sent the very year that postcards first began to have a divided back on which to write both the address and the message.

I leave the reader to decipher the message, if they wish.