Timelines of the redshift determination for ten high-ɀ GRBs in the ɀ ≳ 6 sample. Two of these only have relatively insecure photometric redshifts. Three further ones were so distant that the Lyman-α line lies in the infrared and only low-S/N spectra allowing a redshift determination and little else could be obtained. In the other cases the Lyman-α line still lies in the optical regime and higher-quality spectra were usually obtained (especially for GRBs 130606A, 140515A, and 210905A).