Dear All, This is the third announcement for the conference in memory of Saunders Mac Lane, at the University of Chicago, April 7 through April 11 2006. To register, please send an e-mail to Eugenia Cheng at the above address. ACCOMMODATION DEADLINE Please note the approaching deadline: special room rates at the Ramada are available until March 6. Note that cancellation incurs no fee provided you give at least 24 hours' notice. The phone number is +1-773-288-5800; apologies for the error in the previous announcement. For further information including updated travel information, current list of participants and previous announcements please see http://www.math.uchicago.edu/~eugenia/maclane We look forward to seeing you in April. With best regards, The organisers Peter May Eugenia Cheng