I say 'an historic house', so that's how I write it. The general rule is that you use 'an' before a following vowel sound. Notice that it's the sound that counts, not the spelling. For instance, it's 'an honor to meet you', because 'honor' is pronounced starting with the vowel [a], even though it is spelled starting with the consonant 'h'.
Now before the noun 'history', which starts with the sound [h] and the letter 'h', you use 'a': 'a history of spam'. But in the adjective 'historical', the main stress has been shifted to the right onto '-tor-', and this leaves the first syllable 'his-' with no stress. A sound [h] is generally lost from the beginning of an unstressed syllable in English. So, even though 'history' starts with a consonant sound (the [h]), 'historical' starts with a vowel sound ([i]), because the [h] sound was lost, even though the letter 'h' is kept in the spelling.
I know that's complicated, but it gets a little worse. The dropping of the [h] sound in 'historical' is sort of optional. Depending on speaker and style, the [h] might or not drop. In my own pronunciation, oddly enough, it doesn't make any difference as to whether preceding 'an' is used -- it is used even when [h] is still there. However, I can well imagine that some speakers of English who do not drop the [h] of 'historical' can use 'a', rather than 'an', before the [h] here. (Not me, though.)
Sorry but - no !... It's your homework - you're supposed to write it yourself !
The singular possessive form is: Mr. Harris's house is number twelve.The plural possessive form is: The Harrises' house is number twelve.
I went into the store. I went into the house because it was cold outside.
The old house had a neglected garden overrun with weeds and tangled bushes.
Charming, bustling, quaint, historic.
Lefferts Historic House was created in 1920.
Historic Anderson House Hotel was created in 1856.
Jacques Guibourd Historic House was created in 1806.
Hearthstone Historic House Museum was created in 1882.
Chief Vann House Historic Site was created in 1804.
Senate House State Historic Site was created in 1676.
The web address of the Gruenewald Historic House is: http://www.gruenewaldhouse.com
The phone number of the Hearthstone Historic House Museum is: 414-730-8204.
Felix Vallé House State Historic Site was created in 1970.
Scott Joplin House State Historic Site was created in 1983.
Vandalia State House State Historic Site was created in 1836.
William Whitley House State Historic Site was created in 1938.