There were 3 games v Hearts in 93/94. Law played in all 3, but Britton only once. Looks like him behind Jamieson. So...
23 October 1993. [That date rings a bell somehow.]
0-0.
Thistle: Nelson, Law, Milne, Watson, Jamieson, Taylor, Shaw, Craig, Grant, Britton, Cameron. (English.)
Hearts: Walker, McLaren, McKinlay, Levein, Hogg, Weir, MacKay, Leitch, Colquhoun, Johnston, Johnston.
Ref: Mr Bonkle from Dallas.