Firstly, there is a shop front on Nicolson Street in Edinburgh which lies within the Old Town's World Heritage Site. It was recently discovered that this 1899 building by P.L. Henderson, had many original Victorian features intact both outside (beneath the shop's modern signage) and inside (including Henderson's trademark ornate ceilings). The shop is now occupied by Poundsavers but the 1899 design was purpose built for McIntyre's Drapery Stores. Read here for full details of the restoration work.
The second case of a recent effort to preserve an example of Henderson's work is also in Edinburgh. In 1883, a competition was held to design a new building to house the Edinburgh Meat Market. Peter Henderson won and his building was completed the following year in Fountainbridge. The building remained for a long-time after the meat market itself moved out of town. Prior to its demolition in 2007, the building housed a restaurant. Henderson's iconic entrance arches, complete with carved bull's heads, were deemed important enough to salvage during demolition and now stand west of their original location. More on this story here.