From the Wiki entry:
Burial ground[edit]
The common burial ground, described in many media reports as a "mass grave", was not marked or registered with the authorities, and no records were kept of burials there.[16] Local residents had been aware of its existence since 1975, when two boys smashed a concrete slab and discovered bones underneath.[6][17] Locals thought that the grave contained the remains of victims of the Great Famine or unbaptised babies.[9] It was resealed shortly afterwards, following prayers at the site by a priest. The number of bodies was then unknown, but was assumed to be small.[9][17] After this first discovery, a local couple looked after the burial site for 35 years.
On 7 June 2014, The Irish Times quoted Catherine Corless as saying that the story "has been widely misrepresented" in the the few days since it broke nationally and internationally. Corless was described as thinking that it seems impossible "that more than 200 bodies could have been put in a working sewage tank". The newspaper report echoed the RTÉ broadcast by casting serious doubt on whether the childrens' remains were actually interred within a septic tank, and also quoted a man who, as a boy, discovered skeletons there in 1975, who said that he saw only about 20 skeletons.[2] Another Irish Times report on the same day indicated that Garda Síochána sources had pointed out that details of the case, as earlier reported, such as that almost 800 children were buried at the site, and that they were in a septic tank, had not yet been "properly tested".[22]
I'm still awaiting assistance from you with my poor reading comprehension. Where is this small plot on the back of the property where these children were buried? And, please decide, is it a septic tank, a "common crypt" or both?