1. J. W. Alexander, On the deformation of ann-cell,Proc. Nat. Acad. Sci. U.S.A., 9 (1923), 406–407.
2. J. F. P. Hudson,Collaring theorems (to appear).
3. J. F. P. Hudson,Covering isotopies (to appear).
4. J. F. P. Hudson andE. C. Zeeman,On regular neighbourhoods (to appear).
5. N. H. Kuiper (to appear).