I started looking for an internship very late -- didn't know I wanted to do finance for a while, didn't know that soph summer internships were so important until recently. I struck out at a lot of interviews, but finally today received an offer for an unpaid ER internship. Luckily I can afford to take unpaid, and I really like the office and I like ER in general. I'd like to do it this sumer so I can know if I want to do it full-time or do something more along the lines of IB. Yesterday, I scheduled an interview for tomorrow and one for Friday -- do I e-mail and cancel these? One is with the same firm, so I think I will e-mail her and explain that I was offered ER and will be taking that position so she should focus on other candidates for the other position.