You should write back a thank you and let Sirro know you're a collector. Might be able to help you find other ex players you need to sign cards for you.
Not a Mailday, but went to the Bulldog Belmore Today for some Signatures. A very low fan attendence, but Brett and Josh Morris were there along with some other unheard of first graders. Steve Turner was there as usual, being cameraman. Josh Morris saw the 2008 Brett Morris Telegraph and stated that the photo was actually him.