Dear colleagues, In addition to Leinster's message of 10 Mar 2002, answering a question of John Baez on weak and strict 2-groupoids, I would like to add that the paper K.A. Hardie, K.H. Kamps, R.W. Kieboom, A homotopy bigroupoid of a topological space, Applied Categorical Structures 9 (2001), 311-327. indeed addresses (in corollary 4.3) the biequivalence between the fundamental (or homotopy) bigroupoid and the homotopy 2-groupoid of a Hausdorff space. The (strict) homotopy 2-groupoid of a Hausdorff space has been introduced in K.A. Hardie, K.H. Kamps, R.W. Kieboom, A homotopy 2-groupoid of a Hausdorff space, Applied Categorical Structures 8 (2000), 209-234. My talk in Coimbra focused on a 9-term exact sequence, which can be associated to a fibration of bigroupoids. This result is now published in K.A. Hardie, K.H. Kamps, R.W. Kieboom, Fibrations of bigroupoids, Journal of Pure and Applied Algebra 168 (2002), 35-43. Best regards, Rudger Kieboom 21-Mar-2002 03:46:09 -0400,4459;000000000000-00000000