Peta doesn’t seem to have appeared in standard Harrison Marks publications but as Karen Townsend in Mayfair Vol.6 No.12 (December 1971) and Whitehouse No.6.
What is certain is that she did several adult films for Harrison Marks in the late 1960s and 70s. These included Lorita on a Summer Night (1973), The Girl Upstairs, The Swingers, The Barn Orgy, A Night at the Bistro Bordello and Zum Knutschkeller. The last being the German hardcore version of A Night at the Bistro Bordello, which also included an appearance by Ava Cadell. All of these films show that Peta wasn’t a shy girl and was happy to perform in front of the camera and do full hardcore scenes, leaving nothing to the imagination!
Source: https://thekameraclub.com/2017/05/18/peta-gareth-the-girl-upstairs/
