Here's the back of the card, written on March 9th, 1916 by Silas Davis.
The message reads:
I wish you a Happy Birthday & Many to foller. from Silas Wayburg (?) Davis
The second card was sent to Minnie Crosby in Norwich, new York in 1915.
We are all well but papa he has got a sore leg
please excouse writting From Clara W.