looking for 2 adopted siblings from Chicago but don't know how to start..Help

Contact the Illinois Adoption Registry at 877-323-5299. If they do not answer be sure to listen to the whole recording and leave your name and a call back number. The manager (Vicki) is really good at explaining what some of your options are even though you do not have a date of birth or sex of the siblings. Be sure to tell her that your mother is deceased and you would be a birth sibling to the adopted children. Good Luck