Counties of Ireland and the counties they consisted off remained uncertain. In 1598 Meath is considered a province in Hayne's "Description of Ireland", and included the counties of Cavan, East Meath, Longford, and Westmeath. This contrasts to George Carew's 1602 survey where there were only four provinces with Longford part of Connaught and Cavan not mentioned at all with only three counties mentioned for Ulster. During Perrot's tenure as Lord President of Munster before he became Lord Deputy, Munster contained as many as eight counties rather than the six it later consisted of. These eight counties were: the five English counties of Cork,
County Cavan springs near Bailieborough; the River Annalee which flows from Lough Sillan and joins the Erne; and the Cladagh river which rises from Cuilcagh and flows into Fermanagh. The Glyde and the Owenroe also source in Cavan. Cavan is known as 'The Lakeland County' and is reputed to contain 365 lakes. At , Lough Sheelin is the county's largest lake; it is situated in the south of the county and forms a three way border on its waters between counties Meath, Westmeath and Cavan. A large complex of lakes form in the north and west of Cavan into designated Specially Protected