Sapper
James Alexander

 According to Woodward:

James Alexander appears to have died or left B.C. before Nov. 1907.

However, the discovery of a letter written on the 7th July 1860, offers a different fate for Sapper Alexander

New Westminster
7th July 1860

To His Excellency James Douglas
Sir,
I have the honour to represent to you the benefit that would acrue in maintaining the discipline of the Detachment of Royal Engineers serving in this Colony, if these men,

Sapper James Alexander, RE
Sapper Robert Robertson, RE
Sapper James Cooper, RE

who are now undergoing a sentance of Imprisonment in the Jail at Victoria for the crime of Desertion, be sent to England to the Head Quarters of the Corps at Chatham. 

If Your Excellency will sanction this step, I will communicate with the Naval Commander in Chief with a view to passage being provided for them in the first Man-of-War ordered home.

Captain Parsons RE, will deliver this letter to Your Excellency and is authorized by me to carry out the measure after he shall have received your approval of it.

I have the honour to be,
Sir,
Your most obedient,
humble Servant,
RCMoody
Col. Commanding

As a Sapper, Alexander's Regimental Pay per Diem would have been 1s. 2 1/2d. plus Working Pay per Diem of 1s. to 4s.