Joni Mitchell will not appear in concert at a Carleton University this Sunday as scheduled. She is presently suffering from hepatitis and will not be able to perform as a part of the Homecoming '68 festivities.

Appearing in her place will be Jerry Jeff Walker, a tall 26 year old singer-composer, who recently rose to fame with his song "Mr. Bojangles." Walker, whose style resembles that of Gordon Lightfoot, incorporates his experiences into his songs. His lyrics deal with pettiness, religion, war and social irritations.

The popular folk-rock group "3's A Crowd" will share the Homecoming Concert spotlight with Walker.