 While the general outline of these buildings, with steeply pitched roofs, lower chancels and small bellcotes are easily recognisable, the form varies from tiny buildings like St Mark's Greendale, (1848) to the somewhat larger cruciform St Michael's, Wollongong, (1858).Even at a church as remote as St Mark's, which was surrounded by fields and forest, and had neither village nor full-time priest, the details of the design commanded Blacket's care, the little building having an elegant gable over its fluted doorway, and floral bosses, long since destroyed, at the ends of its drip moulding.Blacket's small church designs varied in style from Norman at St Silas, Waterloo; to staid Early English Gothic as at St Peter's, Watson's Bay (1864) and St Thomas's, Narellan (1880); to Perpendicular at Holy Trinity, Berrima, (1847) a comparatively wide church spanned by a hammerbeam roof of unusual design.