There was a considerable height difference between Harrington and Gloucester Streets and for the entire nineteenth century there were no buildings with a Gloucester St frontage at the northern end of the block; rather single and two storey buildings were located in the hollow below which became known as Frog Hollow. The housing in Frog Hollow was of a much lower standard than the terrace that developed fronting Harrington St. These buildings had no street access, and were accessed via stairs and passageways. Frog Hollow contained 13 dwellings.