Stav01,
9648 J Smithwith is listed on the Supplementary Roll for the 45th (Dublin) Company IY for the clasps SA01 and SA02 (WO100/126p9). A note says he served as Lt in the 27th Btn IY. He is the only man on that page with the SA02 clasp.
His QSA appears on WO100/126p7 for clasps CC OFS & Tr.
If you search the site, you find an entry in the shipping records showing him returning to the UK in Sept 1902.
Finally, there may be attestation papers for him in WO128 at the National Archives.
Good luck!
David