Andrew,
Letters to you are normally only sent once a month on the 24th to reminisce about another month going by and to see how much you have grown. But, like everything there are exceptions to the rule and today is one of them...
We must talk about your sleeping patterns. You have a great schedule during the day, I don't want that to change at all. What we need to change is your night time sleeping pattern. Up until Christmas, you were sleeping through the night. I would put you down at 7:30 and you would wake up around 7 the next morning. After Christmas we went to Tahoe and you woke up a couple of times a night. Not that big of a deal, we were in a strange place and you were in a new crib. Then we came back home and you tricked me by sleeping through the night a few times and then waking up a few times. OK, I thought, you were just getting back into your routine. Then you got a cold and once again, you were up two or three times every night and it hasn't stopped since then! I've tried letting you put yourself back to sleep but it just hasn't been working. Mostly because I give in after a few minutes because I know if I go get you, I can have you back to sleep in 10 minutes. Here's the biggest problem with that: mommy doesn't go back to sleep! It takes me anywhere from 30-40 minutes to fall back asleep. When you are waking up two or three times a night, this means I'm not sleeping very much at all! (And daddy wonders why I want to go to bed at 9 every night!)
I'm begging you little man, please start sleeping through the night again. I'm honored that you wake up and miss me in the middle of the night but I promise, if you sleep through the night, we have the whole day to play the next day! It not good to get in the habit of waking up multiple times a night, your future wife is not going to like that. And, I know you are not hungry because you eat plenty during the day! Now that you have no more excuses to wake up, I expect that you will be sleeping through the night with no problem.
Just in case you forgot what you look like when you sleep, here is a picture of when you used to sleep all night long. See how peaceful and happy you are!!

Love,
Your tired mommy