Hi Alison
The 19th Hussars were in India (with approved wives and children) until September 1899. They had been there since the end of 1891.
The 19th Hussars were sent with the expectation of war starting, so the families would have been sent back to England, probably via the Suez canal.. As William Oakley is in the UK in 1901 and is not listed on the Boer War medal roll he would have travelled back with the families. Soldiers only had to step onshore in order to receive the medal. They would have returned to the depot in Canterbury. You will have to get that death certificate to be certain. If he died while still serving his papers would have been destroyed 20 years later.
I cannot explain the separate arrangements. Normally married men lived with their families in married quarters. However the 19th Hussars alone would have had 40-50 additional families to house – not to mention the same with other cavalry units sent to South Africa from India, so they probably ran out of space.
Here are some of the men with nearby numbers. As you can see most were discharged even before the end of the war. Someone with Findmypast may be able to tell you when some of the men enlisted.
Talbot W.G. 3169 Discharged, 28/10/01
Saggers A.G. 3170 Discharged, 26/10/01
Adams J. 3172 Discharged
Ridgeway F. 3177 Discharged, 26/10/01
Makings J. 3178 Discharged, 22/10/01
Rivett G. 3179 Discharged, 26/10/01
Ford W. 3183
Fowler G. 3184 Discharged, 28/10/01
Ramsay J. 3185
Jackson W. 3187
Barnes A. 3200 Discharged, 31/10/01
Parker A. 3205 Discharged, 28/10/01
Holdsworth C. 3212
Larrard F. 3216 Discharged, 21/10/01
Cheetam J. 3217 Discharged, 30/11/01
Thompson J. 3218 Discharged, 07/12/01
Heard W.J.T. 3219 Discharged, 13/12/01
Williams J.F. 3220 Discharged, 20/11/02
Hall C. 3224 Discharged, 09/12/01
Rushton W. 3225 Discharged, 09/12/01
Southgate G. 3230 Discharged, 15/11/01
Ken