Symons gave the number of Police on 11th January 1879 as 4 officers under Dartnell and 128 men. This excluded HQ and the Harding detachment left to guard the Pondoland border. Holt also gave the actual number assembled for the invasion as 111 incl. Dartnell, a figure taken from Trpr. Clarke's roll. On the 23rd January Clarke used his 134-man roll to confirm N.M.P. casualties; three (Sub-Insp. Fred. W. Bampton, Trprs. Bacon, Patrick) were not on the medal roll. Either the remaining 131 were all on the Mangeni or 20 men must have left camp (on escort duty rearwards? under Bampton?) so that Clarke could both have a roll of 134 and a presence of 111.
Three men were at Rorke’s Drift hospital and 34 at Isandhlwana (incl. Trpr. Parsons sent back to camp by Dartnell for accidentally firing his revolver). The likelihood is that 3 officers and 70 men(possibly 90) were on the Mangeni (and Dartnell, under the General Staff figure). Norris-Newman estimated the number sent out on Dartnell’s patrol at “100 Mounted Police, and fifty Volunteers”, which, realistically, could confirm either total of 74 or 94 men.
Boik might have been out with Dartnell's patrol, equally he might not; there is no independent corroboration (yet).