You were at the Celtic v Villa game?
The game in the article is a friendly from 86 before either Walter's or Elliot came to Scotland when both were at Villa.
Tynecastle was the week after the piggery and has often been portrayed as the worst of the two - not in my opinion. It was a copy cat effort and potentially looked worse due to the fact the fans are closer to the pitch and was confined to a smaller location.
At the piggery it was more widespread among a greater number of people, with every fruit shop in the area having sold out and extremely vocal fans booing Walters every touch in addition to the monkey chants and costumes. Even Gerry Britton, who was with the youth team at the time and had to clean up afterwards, said he was embarrassed by his fellow fans and that it was the worst he had ever experienced.
The big difference, and why people seem to recall Tynecastle as being worse, was the manner of the reporting - the media actually joked about it at Parkhead and played it down. They probably hoped it was a one off for his debut and only really expressed any sense of outrage the following week when Hearts repeated the scums actions.
That, anyway, is how I recall it having been at both games.