The collection consists of 55 watercolour paintings on paper and card of varying sizes, purchased by Archie and Jean McGregor during 1963-1966, while McGregor was manager of the Bank of New South Wales in Alice Springs. The collection represents 18 prominent artists of the Hermannsburg group that followed Albert Namatjira's success during the 1960s, amid debates over citizenship and financial rights.
The artists represented in the collection were all born, and the majority began painting, during Albert Namatjira's lifetime, most learning from him and painting with him: Albert Namatjira's sons, Enos, Oscar, Keith and Maurice, and Enos Namatjira's son Gabriel, Albert Namatjira's nephew Walter Ebatarinja and his wife Cordula, Henoch and Herbert Raberaba, Otto and Edwin Pareroultja, Richard Moketarinja, Benjamin Landara, Lindsay Imbarndarinja, Norman Ratara, Claude Pannka, Arnulf Ebatarinja and Athanasius Renkaraka. The artists developed their own styles, selling their work through an advisory council, art dealer or directly to tourists, cutting their artist's boards up into easily transportable sizes and often painting scenes that had proved popular in sales.