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Update Reference.md

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@ -61,16 +61,15 @@ Creating an instance of this **class** adds a new HAP Accessory to the HomeSpan
* every HomeSpan sketch requires at least one Accessory
* there are no associated methods
* the argument *aid* is optional.
* if specified and *not* zero, the Accessory ID is set to *aid*.
* if unspecified, or equal to zero, the Accessory ID will be set to one more than the ID of the previously-instantiated Accessory, or to 1 if this is the first Accessory.
* the first Accessory instantiated must always have an ID=1 (which is the default if *aid* is unspecified).
* setting the *aid* of the first Accessory to anything but 1 throws an error during initialization.
* you must call `homeSpan.begin()` before instantiating any Accessories
* example: `new SpanAccessory();`
The first argument is required; the rest are optional:
* *pin* - the ESP32 pin to which a one pole of a normally-
## *SpanService()*
This is a **base class** from which all HomeSpan Services are derived, and should **not** be directly instantiated. Rather, to create a new Service instantiate one of the HomeSpan Services defined in the [Service](ServiceList.md) namespace. No arguments are needed.